C语言如何实现学生档案管理系统

2023-06-30 17:06:26 310人浏览八月长安
摘要
今天小编给大家分享一下C语言如何实现学生档案管理系统的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。#include<s
今天小编给大家分享一下C语言如何实现学生档案管理系统的相关知识点，内容详细，逻辑清晰，相信大部分人都还太了解这方面的知识，所以分享这篇文章给大家参考一下，希望大家阅读完这篇文章后有所收获，下面我们一起来了解一下吧。
C语言如何实现学生档案管理系统
#include<stdio.h>#include<string.h>#include<stdlib.h>#include<coNIO.h>#include<windows.h>#define N sizeof(struct Student)#define M sizeof(struct PassWord)#define MAX 1000  struct Student{    char number[10];   //学号    char name[10];   //姓名    char sex[2];  //性别    struct Birthday  //出生日期     {        int year;   //年        int month;  //月        int day;    //日     }birtnday;    struct Score  //成绩    {        float c_language;  //c语言        float math;  //高数        float Russian;//俄语        float Russian_hearing; //俄语听力        float professional;  //专业导论        float politics;  //政治     }score;    char remark[100];  //备注     int num;    struct Student *next;};typedef struct Student Stu;typedef Stu *Stup;  typedef struct Password{    char password[18];    struct Password *next;}pass;typedef pass *passw; typedef struct TOTAL    //总分 {    char number[10];    char name[10];    char sex[2];    float c_language;  //c语言    float math;  //高数    float Russian;//俄语    float Russian_hearing; //俄语听力    float professional;  //专业导论    float politics;  //政治    float sum;}Total; Total total[MAX];  //好多自定义函数 void color(short x);//设置颜色void HideCursor();     //隐藏光标void toxy(int x, int y);     //将光标移动到X,Y坐标处void menu();    //主菜单 void over();   //退出软件void signin();   //登陆 passw ff();    //将文件中的内容读入链表，返回值为表头地址 void save_password(passw p);//保存密码 void amend_password();   //修改密码 void input_infORMation();  //信息录入 void amend_information();  //修改信息 void delete_information();  //删除信息 void delete_number();  //按学号查询删除void delete_name();   //按姓名查询删除 void save_information(Stup p);   //保存信息 void print_information();    //信息显示 Stup ss();   //将文件中的内容读入链表，返回值为表头地址void find_information();   ///查找信息 void find_number_information();   //按学号查询 void find_name_information();   //按姓名查询 void statistics_information();  //信息统计 void average_score();   //平均分void total_score_ranked();   //总分排名void fail_numbers();     //各科不及格人数 void assignment();   //将信息赋值到一个结构体中 void grade_table();   //各科成绩分布 void analyze_c();   //c语言 void analyze_math();//高数 void analyze_Russian();//俄语 void analyze_Russian_hearing();//俄语听力 void analyze_professional();//专业导论 void analyze_politics();   //政治 int cmp(const void *a,const void *b);int cmp1(const void *a,const void *b);  //快速排序 int cmp2(const void *a,const void *b);int cmp3(const void *a,const void *b);int cmp4(const void *a,const void *b);int cmp5(const void *a,const void *b);int cmp6(const void *a,const void *b);   char _password[18];passw password_head;int len; void color(short x)    //设置颜色 {    if(x>=0&&x<=15)    {        SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),x);    }    else    {        SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),x);    }}  void HideCursor()     //隐藏光标{ CONSOLE_CURSOR_INFO cursor_info = {1, 0};  SetConsoleCursorInfo(GetStdHandle(STD_OUTPUT_HANDLE), &cursor_info);} void toxy(int x, int y)      //将光标移动到X,Y坐标处{COORD pos = { x , y };HANDLE Out = GetStdHandle(STD_OUTPUT_HANDLE);SetConsoleCursorPosition(Out, pos); } int cmp(const void *a,const void *b)  //快速排序 {    return ((*(Total *)b).sum)-((*(Total *)a).sum);} int cmp1(const void *a,const void *b)  //快速排序 {    return ((*(Total *)b).c_language)-((*(Total *)a).c_language);} int cmp2(const void *a,const void *b)  //快速排序 {    return ((*(Total *)b).math)-((*(Total *)a).math);} int cmp3(const void *a,const void *b)  //快速排序 {    return ((*(Total *)b).Russian)-((*(Total *)a).Russian);} int cmp4(const void *a,const void *b)  //快速排序 {    return ((*(Total *)b).Russian_hearing)-((*(Total *)a).Russian_hearing);} int cmp5(const void *a,const void *b)  //快速排序 {    return ((*(Total *)b).professional)-((*(Total *)a).professional);} int cmp6(const void *a,const void *b)  //快速排序 {    return ((*(Total *)b).politics)-((*(Total *)a).politics);} void menu()   //主菜单{    do    {        system("cls");    //清屏         fflush(stdin);   //清空缓存         color(14);        char t;        toxy(45,6);        printf("-----学生档案管理系统-----");         toxy(45,7);        printf("|                        |");        toxy(45,8);        printf("|       1.信息录入       |");        toxy(45,9);        printf("|                        |");        toxy(45,10);        printf("|       2.信息修改       |");        toxy(45,11);        printf("|                        |");        toxy(45,12);        printf("|       3.信息删除       |");        toxy(45,13);        printf("|                        |");        toxy(45,14);        printf("|       4.信息显示       |");        toxy(45,15);        printf("|                        |");        toxy(45,16);        printf("|       5.信息查找       |");        toxy(45,17);        printf("|                        |");        toxy(45,18);        printf("|       6.信息统计       |");        toxy(45,19);        printf("|                        |");        toxy(45,20);        printf("|       7.修改密码       |");        toxy(45,21);        printf("|                        |");        toxy(45,22);        printf("|       8.退出软件       |");        toxy(45,23);        printf("--------------------------");        t=getch();        switch(t)        {            case '1':input_information();break;            case '2':amend_information();break;            case '3':delete_information();break;            case '4':print_information();break;            case '5':find_information();break;            case '6':statistics_information();break;            case '7':amend_password();break;            case '8':over();break;            default :break;        }    }while(1);//永远为真 }  passw ff()     //将文件中的内容读入链表，返回值为表头地址 {    FILE *fp;  //文件指针     passw password_head=NULL;    fp=fopen("password","a+");   //以追加和读的方式打开名为password的文件     if(fp==NULL)    {        printf("cannot open file");     }    //printf("%p\n",password_head);    password_head=(passw)malloc(M);   //申请空间     strcpy(password_head->password," ");  //初始化密码     //printf("%s\n",password_head);    fread(password_head,M,1,fp);       fclose(fp);    //关闭文件     return password_head;   //返回值表头地址 } void signin()    //登录 {    do    {        system("cls");        color(13);   //好看的颜色         passw p,head;        int i=0;        char k;        head=ff();   //调用函数，返回值为表头地址         p=head;             //printf("%s\n",p->password);        //printf("%p\n",p);        char str[]="000000";   //初始密码         toxy(45,6);        printf("-----学生档案管理系统-----");        toxy(45,8);        printf("请输入管理者密码：");        for(;;)              //此处为输入密码不回显操作         {            k=getch();       //输入k             if(k=='\r')      //如果输入k为回车，则跳出循环             {                break;            }            else if(k=='\b')  //如果输入k为删除键             {                if(i>0)       //如若密码还没完全删除                 {                    printf("\b");                    printf(" ");                    printf("\b");                    i--;                }            }            else              //如果输入的k既不是删除键，也不是回车键             {                _password[i]=k;   //把k的值赋给_password[i];                 printf("*");      //输出*号，保护用户隐私                 i++;              //密码位数加1             }        }        _password[i]='\0';        if(strcmp(p->password," ")==0)   //判断程序是否是第一次运行，        {            strcpy(p->password,str);//如果是，则将初始密码000000赋值给p->password             save_password(p);   //保存p         }        if(strcmp(head->password,_password)==0)   //判断密码是否输入正确         {            system("cls");            toxy(45,8);            printf("正在登陆....");            Sleep(500);            menu();        }        else        {            toxy(45,10);            printf("密码错误！");            Sleep(500);        }    }while(1);} void amend_password()   //修改密码 {    system("cls");         //清屏     color(12);    //看着舒服的颜色      passw p,head;       //隐藏光标，看着更舒服     head=ff();    do    {         system("cls");         //清屏        p=head;        char password[18],newpassword[18],t,k;        int i=0;        toxy(45,6);          //将光标移动到坐标为（50，5）的位置         printf("学生档案管理系统");        toxy(48,8);        printf("修改密码");        toxy(45,10);        printf("请输入旧密码：");        for(;;)              //此处为输入密码不回显操作         {            k=getch();       //输入k             if(k=='\r')      //如果输入k为回车，则跳出循环             {                break;            }            else if(k=='\b')  //如果输入k为删除键             {                if(i>0)       //如若密码还没完全删除                 {                    printf("\b");                    printf(" ");                    printf("\b");                    i--;                }            }            else              //如果输入的k既不是删除键，也不是回车键             {                password[i]=k;   //把k的值赋给_password[i];                 printf("*");      //输出*号，保护用户隐私                 i++;              //密码位数加1             }        }        password[i]='\0';        i=0;        toxy(45,12);        printf("请输入新密码：");        for(;;)              //此处为输入密码不回显操作         {            k=getch();       //输入k             if(k=='\r')      //如果输入k为回车，则跳出循环             {                break;            }            else if(k=='\b')  //如果输入k为删除键             {                if(i>0)       //如若密码还没完全删除                 {                    printf("\b");                    printf(" ");                    printf("\b");                    i--;                }            }            else              //如果输入的k既不是删除键，也不是回车键             {                newpassword[i]=k;   //把k的值赋给_password[i];                 printf("*");      //输出*号，保护用户隐私                 i++;              //密码位数加1             }        }        newpassword[i]='\0';        if(p!=NULL)                   //如果p不为空         {            if(strcmp(p->password,password)==0)          //如果旧密码输入正确             {                strcpy(p->password,newpassword);         //将旧密码改为新密码                 break;                                   //跳出循环             }            else                                         //如果旧密码输入错误             {                system("cls");                toxy(46,8);                printf("--------------------------");                toxy(46,9);                printf("|                        |");                toxy(46,10);                printf("|  密码错误！是否继续？  |");                toxy(46,11);                printf("|                        |");                toxy(46,12);                printf("|  1.是           2.否   |");                toxy(46,13);                printf("|                        |");                toxy(46,14);                printf("--------------------------");                while(1)                {                    t=getch();                              //输入t                     if(t=='1')                    {                        system("cls");                        break;                    }                    else if(t=='2')                      menu();                }            }        }    }while(1);           save_password(p);                         //永远为真     system("cls");    toxy(45,10);    printf("修改成功！即将返回主菜单....");     Sleep(500);    menu();}  void save_password(passw p)   //将p所指向的内容保存到文件中 {    FILE *fp;    fp=fopen("password","w");   //以只写的方式打开名为password的文件     if(fp==NULL)    {        printf("cannot open file");     }    if(fwrite(p,M,1,fp)!=1)   //将p所指向的一段大小为M的内容写入fp所指向的文件中     {        printf("write error!");     }    fclose(fp);   //关闭文件 } Stup ss()     //将文件中的内容读出到链表中 {    FILE *fp;    //文件指针     Stup head=NULL,p,p1,pr=NULL;    int n=0;    fp=fopen("student","ab+");    if(fp==NULL)    {        printf("cannot open file");    }    while(!feof(fp))// feof函数可以检查文件读写位置标志是否移动到文件末尾，feof(fp)检查fp所指向的文件是否结束，如果是    {                //则函数值为真，否则为假，即“!feof(fp)”为真，在while循环中检查 “!feof(fp)”为真，就执行循环体        n++;        p=(Stup)malloc(N); //向内存申请一段空间        fread(p,N,1,fp); //从fp所指向的文件读入1个大小为M的数据，存储到p所指向的空间中         if(n==1)        {            head=p;            p1=p;        }        else        {            pr=p1;            p1->next=p;            p1=p;        }    }    if(pr!=NULL)       pr->next=NULL;    else if(pr==NULL)        head=NULL;    fclose(fp);    return head;} void input_information()//录入信息 {    system("cls");    color(15);    int i=0,n;    Stup p;    toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(50,7);    printf("信息录入");    toxy(45,8);    printf("你需要录入多少个学生的信息？请输入：");    scanf("%d",&n);getchar();        while(i!=n)    {        system("cls");        i++;        p=(Stup)malloc(N);        toxy(45,6);        printf("-----学生档案管理系统-----");        toxy(50,7);        printf("信息录入");        toxy(45,8);        printf("请输入学生学号：");        gets(p->number);        toxy(45,9);        printf("请输入学生姓名：");        gets(p->name);        toxy(45,10);        printf("请输入学生性别(男或女)：");        gets(p->sex);        toxy(45,11);        printf("请输入学生出生日期（年月日，以空格隔开）：");        scanf("%d%d%d",&p->birtnday.year,&p->birtnday.month,&p->birtnday.day);getchar();        toxy(45,12);        printf("请输入c语言成绩：");        scanf("%f",&p->score.c_language);getchar();        toxy(45,13);        printf("请输入高数成绩：");        scanf("%f",&p->score.math);getchar();        toxy(45,14);        printf("请输入俄语成绩：");        scanf("%f",&p->score.Russian);getchar();        toxy(45,15);        printf("请输入俄语听力成绩：");        scanf("%f",&p->score.Russian_hearing);getchar();        toxy(45,16);        printf("请输入专业导论成绩：");        scanf("%f",&p->score.professional);getchar();        toxy(45,17);        printf("请输入政治成绩：");        scanf("%f",&p->score.politics);getchar();        toxy(45,18);        printf("请输入备注：");        gets(p->remark);        save_information(p);    }    toxy(48,19);    printf("录入完毕！按任意键返回主菜单！");    getch();} void amend_information()  //修改信息 {    system("cls");         //清屏     color(11);    Stup p,head;    FILE *fp;    int i=15,j=0,c;     char number[10];   //学号    char name[10],_name[10];   //姓名    char sex[2];  //性别    int year;   //年    int month;  //月    int day;    //日    float c_language;  //c语言    float math;  //高数    float Russian;//俄语    float Russian_hearing; //俄语听力    float professional;  //专业导论    float politics;  //政治     char remark[100];  //备注    char ch,t;    head=ss();    p=head;    do    {        system("cls");        toxy(45,6);        printf("-----学生档案管理系统-----");        toxy(45,7);        printf("修改信息");        toxy(40,9);        printf("请输入您要修改的信息：");        gets(_name);        toxy(20,8);        printf("----------------------------------------------------------------------------------------------");        toxy(20,9);        printf("学号   姓名   性别   出生--日期     c语言   高 数   俄 语   俄语听力   专业导论   政 治   备注");        toxy(20,10);        printf("----------------------------------------------------------------------------------------------");        i=11;j=0;        while(p!=NULL)   //将每个结点的p->num都赋为0，以免后面数据干扰         {            p->num=0;            p=p->next;        }        p=head;      //重新让p指向head         while(p!=NULL)        {            if(strcmp(p->name,_name)==0)            {                toxy(18,i);                j++;                if(p->birtnday.month<10&&p->birtnday.day<10)                     printf("%d.%s    %s    %s     %d.0%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",j,p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else if(p->birtnday.month<10&&p->birtnday.day>=10)                    printf("%d.%s    %s    %s     %d.0%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",j,p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else if(p->birtnday.month>=10&&p->birtnday.day<10)                    printf("%d.%s    %s    %s     %d.%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",j,p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else                    printf("%d.%s    %s    %s     %d.%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",j,p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                i++;                p->num=j;      //给p->num赋值，即给满足搜索要求的结点编号             }            p=p->next;        }        if(j==0)                   //如果j=0，即没有进入前面的搜索循环，也就是没有找到相应的信息         {             toxy(50,i);            printf("没有找到相应的信息！(按0返回，按1重新搜索)");            while(1)               //死循环是为了防止除0和1的其他按键干扰             {                ch=getch();                     if(ch=='0')                {                    menu();break;                }                else if(ch=='1')                {                    break;                }            }            if(ch=='1')     //如果输入的ch等于1，则结束本次循环                continue;        }        while(1)        {            toxy(50,i);            printf("请输入您要修改的信息的标号：");            scanf("%d",&c);            getchar();            i++;              if(c<=j)              //如果c<=j，即输入正确                 break;            else if(c>j)         //否则，输入错误             {                toxy(50,i);                printf("没有找到您所要修改的信息，请重新输入！");                i++;                Sleep(500);      //暂停0.5秒             }        }        p=head;      //让p重新指向head，即第一个结点         while(p!=NULL&&p->num!=c)    //遍历链表，寻找满足要求的结点         {            p=p->next;        }        if(p!=NULL)      //如果寻找成功，进入修改部分         {            system("cls");    //清屏             toxy(45,8);            printf("请输入学生学号：");            gets(number);            strcpy(p->number,number);            toxy(45,9);            printf("请输入学生姓名：");            gets(name);            strcpy(p->name,name);            toxy(45,10);            printf("请输入学生性别(男或女)：");            gets(sex);            strcpy(p->sex,sex);            toxy(45,11);            printf("请输入学生出生日期（年月日，以空格隔开）：");            scanf("%d%d%d",&year,&month,&day);getchar();            p->birtnday.year=year;            p->birtnday.month=month;            p->birtnday.day=day;            toxy(45,12);            printf("请输入c语言成绩：");            scanf("%f",&c_language);getchar();            p->score.c_language=c_language;            toxy(45,13);            printf("请输入高数成绩：");            scanf("%f",&math);getchar();            p->score.math=math;            toxy(45,14);            printf("请输入俄语成绩：");            scanf("%f",&Russian);getchar();            p->score.Russian=Russian;            toxy(45,15);            printf("请输入俄语听力成绩：");            scanf("%f",&Russian_hearing);getchar();            p->score.Russian_hearing=Russian_hearing;            toxy(45,16);            printf("请输入专业导论成绩：");            scanf("%f",&professional);getchar();            p->score.professional=professional;            toxy(45,17);            printf("请输入政治成绩：");            scanf("%f",&politics);getchar();            p->score.politics=politics;            toxy(45,18);            printf("请输入备注：");            gets(remark);            strcpy(p->remark,remark);            toxy(46,16);            printf("-------------------------");            toxy(46,17);            printf("|                       |");            toxy(46,18);            printf("|     是否确认修改？    |");            toxy(46,19);            printf("| 1.确认         2.取消 |");            toxy(46,20);            printf("|                       |");            toxy(46,21);            printf("-------------------------");            while(1)    //死循环为防止其他按键干扰             {                t=getch();                if(t=='1')                   break;                else if(t=='2')                {                    menu();                }             }              if(t=='1')  //如果t等于1，则跳出循环              {                 break;              }        }    }while(1);    p=head;     //p重新指向头节点     system("cls");    toxy(44,12);    printf("正在修改....");    fp=fopen("student","wb");   //打开文件的同时清除文件内的内容     if(fp==NULL)    {        printf("cannot open file");    }    while(p!=NULL)    {        if(fwrite(p,N,1,fp)!=1)    //将p所指向的内容存入fp所指向的文件中         {            printf("file write error\n");        }        p=p->next;    }    fclose(fp);     //关闭文件     Sleep(500);    system("cls");    toxy(44,12);    printf("修改成功！正在自动跳转到主菜单....");    Sleep(500);    menu();} void delete_information()  //删除信息 {    do    {        system("cls");        color(12);        char t;        toxy(45,6);        printf("-----学生档案管理系统-----");        toxy(48,7);        printf("信息删除");        toxy(45,9);        printf("1)  按学号查询删除");        toxy(45,11);        printf("2)  按姓名查询删除");        toxy(48,13);        printf("按0返回主菜单");        t=getch();        switch(t)        {            case '0':menu();break;            case '1':delete_number();break;            case '2':delete_name();break;            default :break;        }    }while(1);} void delete_number()  //按学号查询删除 {    do    {        system("cls");        color(10);        char number[10];        char t,c;        int i=11,j=0;        Stup head,p,pre=NULL ;        FILE *fp;        toxy(48,9);        printf("请输入你要删除的学生的学号：");        gets(number);        head=ss();        p=head;        toxy(45,6);        printf("-----学生档案管理系统-----");         toxy(20,8);        printf("----------------------------------------------------------------------------------------------");        toxy(20,9);        printf("学号   姓名   性别   出生--日期     c语言   高 数   俄 语   俄语听力   专业导论   政 治   备注");        toxy(20,10);        printf("----------------------------------------------------------------------------------------------");        while(p!=NULL&&strcmp(p->number,number)!=0)        {            pre=p;            p=p->next;        }        if(p!=NULL)        {            toxy(20,i);            if(p->birtnday.month<10&&p->birtnday.day<10)                 printf("%s    %s    %s     %d.0%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);            else if(p->birtnday.month<10&&p->birtnday.day>=10)                printf("%s    %s    %s     %d.0%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);            else if(p->birtnday.month>=10&&p->birtnday.day<10)                printf("%s    %s    %s     %d.%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);            else                printf("%s    %s    %s     %d.%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);            toxy(45,i+1);            printf("1.删除        2.取消");            while(1)            {                c=getch();                if(c=='1')                    break;                else if(c=='2')                    delete_number();            }            if(pre==NULL)                head=head->next;            else                pre->next=p->next;            system("cls");             toxy(45,10);            printf("正在删除....");            p=head->next;            fp=fopen("student","wb");            if(fp==NULL)            {                printf("cannot open file");             }            if(fwrite(head,N,1,fp)!=1)            {                printf("write error");            }             fclose(fp);            fp=fopen("student","ab");            if(fp==NULL)            {                printf("cannot open file");             }            while(p!=NULL)            {                if(fwrite(p,N,1,fp)!=1)                {                    printf("write error");                }                 p=p->next;            }            fclose(fp);            Sleep(500);            system("cls");            toxy(45,10);            printf("删除成功！正在返回....");            Sleep(500);            delete_information();         }        else if(p==NULL)        {            toxy(48,i);            printf("您输入的信息不存在！按0返回主菜单，1返回上一级菜单，2重新查找");            while(1)            {                t=getch();                if(t=='0')                {                    menu();                }                else if(t=='1')                {                    delete_information();                }                else if(t=='2')                {                    break;                }            }        }        free(p);    }while(1);} void delete_name()   //按姓名查询删除 {    do    {        system("cls");        color(10);        char name[10];        char t,c;        int i=11,j=0,key;        Stup head,p,pre;        FILE *fp;        toxy(48,9);        printf("请输入你要删除的学生的姓名：");        gets(name);        head=ss();        p=head;        while(p!=NULL)        {            p->num=0;            p=p->next;        }        p=head;        toxy(45,6);        printf("-----学生档案管理系统-----");         toxy(20,8);        printf("----------------------------------------------------------------------------------------------");        toxy(20,9);        printf("学号   姓名   性别   出生--日期     c语言   高 数   俄 语   俄语听力   专业导论   政 治   备注");        toxy(20,10);        printf("----------------------------------------------------------------------------------------------");        while(p!=NULL)        {            if(strcmp(p->name,name)==0)            {                toxy(18,i);                j++;                if(p->birtnday.month<10&&p->birtnday.day<10)                     printf("%d.%s    %s    %s     %d.0%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",j,p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else if(p->birtnday.month<10&&p->birtnday.day>=10)                    printf("%d.%s    %s    %s     %d.0%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",j,p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else if(p->birtnday.month>=10&&p->birtnday.day<10)                    printf("%d.%s    %s    %s     %d.%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",j,p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else                    printf("%d.%s    %s    %s     %d.%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",j,p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                i++;                p->num=j;            }            p=p->next;        }        if(j==0)        {            toxy(48,i);            printf("您输入的信息不存在！按0返回主菜单，1返回上一级菜单，2重新查找");            while(1)            {                t=getch();                if(t=='0')                {                    menu();                }                else if(t=='1')                {                    delete_information();                }                else if(t=='2')                {                    break;                }            }            if(t=='2')                continue;        }        while(1)        {            toxy(50,i);            printf("请输入您要删除的信息的标号：");            scanf("%d",&key);            getchar();            i++;            if(key<=j)              //如果c<=j，即输入正确                 break;            else if(key>j)         //否则，输入错误             {                toxy(50,i);                printf("没有找到您所要删除的信息，请重新输入！");                i++;                Sleep(500);      //暂停0.5秒             }        }        toxy(46,16);        printf("-------------------------");        toxy(46,17);        printf("|                       |");        toxy(46,18);        printf("|       确认删除？      |");        toxy(46,19);        printf("| 1.确认         2.取消 |");        toxy(46,20);        printf("|                       |");        toxy(46,21);        printf("-------------------------");                while(1)        {            p=head;            pre=NULL;            c=getch();            if(c=='1')            {                while(p!=NULL&&p->num!=key)                {                    pre=p;                    p=p->next;                }                if(p!=NULL)                {                    if(pre==NULL)                        head=head->next;                    else                        pre->next=p->next;                }                free(p);                break;            }            else if(c=='2')                delete_number();        }        system("cls");         toxy(45,10);        printf("正在删除....");        fp=fopen("student","wb");        if(fp==NULL)        {            printf("cannot open file");         }        if(head!=NULL&&fwrite(head,N,1,fp)!=1)        {            printf("write error");        }         fclose(fp);        if(head!=NULL)        {            p=head->next;            fp=fopen("student","ab");            if(fp==NULL)            {                printf("cannot open file");             }            while(p!=NULL)            {                if(fwrite(p,N,1,fp)!=1)                {                    printf("write error");                }                 p=p->next;            }            fclose(fp);        }        Sleep(500);        system("cls");        toxy(45,10);        printf("删除成功！正在返回....");        Sleep(500);        delete_information();     }while(1);} void print_information()  //输出信息 {    system("cls");    color(11);    Stup head,p;    int i=11;    head=ss();    p=head;    toxy(45,6);    printf("-----学生档案管理系统-----");     toxy(20,8);    printf("----------------------------------------------------------------------------------------------");    toxy(20,9);    printf("学号   姓名   性别   出生--日期     c语言   高 数   俄 语   俄语听力   专业导论   政 治   备注");    toxy(20,10);    printf("----------------------------------------------------------------------------------------------");    while(p!=NULL)    {        toxy(20,i);        if(p->birtnday.month<10&&p->birtnday.day<10)             printf("%s    %s    %s     %d.0%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);        else if(p->birtnday.month<10&&p->birtnday.day>=10)            printf("%s    %s    %s     %d.0%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);        else if(p->birtnday.month>=10&&p->birtnday.day<10)            printf("%s    %s    %s     %d.%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);        else            printf("%s    %s    %s     %d.%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);        i++;        p=p->next;    }    toxy(45,i);    printf("按任意键返回主菜单！");    getch();} void find_information()  //查找信息 {     do    {        system("cls");        char t;        color(10);        toxy(45,6);        printf("-----学生档案管理系统-----");        toxy(50,7);        printf("查找信息");        toxy(48,9);        printf("1)  学号查询");        toxy(48,11);        printf("2)  姓名查询");        toxy(48,13);        printf("按0返回主菜单");        t=getch();        switch(t)        {            case '0':menu();break;            case '1':find_number_information();break;            case '2':find_name_information();break;            default :break;        }    }while(1);} void find_number_information()  //按学号查找 {    do    {        system("cls");        color(10);        char number[10];        char t;        int i=11,j=0;        Stup head,p;        toxy(48,9);        printf("请输入你要查找的学生的学号：");        gets(number);        head=ss();        p=head;        toxy(45,6);        printf("-----学生档案管理系统-----");         toxy(20,8);        printf("----------------------------------------------------------------------------------------------");        toxy(20,9);        printf("学号   姓名   性别   出生--日期     c语言   高 数   俄 语   俄语听力   专业导论   政 治   备注");        toxy(20,10);        printf("----------------------------------------------------------------------------------------------");        while(p!=NULL)        {            if(strcmp(p->number,number)==0)            {                toxy(20,i);                if(p->birtnday.month<10&&p->birtnday.day<10)                     printf("%s    %s    %s     %d.0%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else if(p->birtnday.month<10&&p->birtnday.day>=10)                    printf("%s    %s    %s     %d.0%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else if(p->birtnday.month>=10&&p->birtnday.day<10)                    printf("%s    %s    %s     %d.%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else                    printf("%s    %s    %s     %d.%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                i++;                j++;           }            p=p->next;        }        if(j==0)        {            toxy(48,i);            printf("您输入的信息不存在！");        }        toxy(48,i+1);        printf("按0继续查找，按1返回");        while(1)        {            t=getch();            if(t=='0')            {                break;            }            else if(t=='1')            {                find_information();            }         }     }while(1);} void find_name_information()   //按姓名查找 {    do    {        system("cls");        color(10);        char name[10];        char t;        int i=11,j=0;        Stup head,p;        toxy(48,9);        printf("请输入你要查找的学生的姓名：");        gets(name);        head=ss();        p=head;        toxy(45,6);        printf("-----学生档案管理系统-----");         toxy(20,8);        printf("----------------------------------------------------------------------------------------------");        toxy(20,9);        printf("学号   姓名   性别   出生--日期     c语言   高 数   俄 语   俄语听力   专业导论   政 治   备注");        toxy(20,10);        printf("----------------------------------------------------------------------------------------------");        while(p!=NULL)        {            if(strcmp(p->name,name)==0)            {                toxy(20,i);                if(p->birtnday.month<10&&p->birtnday.day<10)                     printf("%s    %s    %s     %d.0%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else if(p->birtnday.month<10&&p->birtnday.day>=10)                    printf("%s    %s    %s     %d.0%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else if(p->birtnday.month>=10&&p->birtnday.day<10)                    printf("%s    %s    %s     %d.%d.0%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                else                    printf("%s    %s    %s     %d.%d.%d     %.2f   %.2f   %.2f     %.2f     %.2f     %.2f    %s\n",p->number,p->name,p->sex,p->birtnday.year,p->birtnday.month,p->birtnday.day,p->score.c_language,p->score.math,p->score.Russian,p->score.Russian_hearing,p->score.professional,p->score.politics,p->remark);                i++;                j++;           }            p=p->next;        }        if(j==0)        {            toxy(48,i);            printf("您输入的信息不存在！");        }        toxy(48,i+1);        printf("按0继续查找，按1返回");        while(1)        {            t=getch();            if(t=='0')            {                break;            }            else if(t=='1')            {                find_information();            }         }     }while(1);} void assignment()   //将链表的内容赋值给一个结构体数组 {    Stup head,p;    head=ss();    p=head;    int i=0;    while(p!=NULL)    {        strcpy(total[i].number,p->number);        strcpy(total[i].name,p->name);        strcpy(total[i].sex,p->sex);        total[i].c_language=p->score.c_language;        total[i].math=p->score.math;        total[i].Russian=p->score.Russian;        total[i].Russian_hearing=p->score.Russian_hearing;        total[i].professional=p->score.professional;        total[i].politics=p->score.politics;        total[i].sum=total[i].c_language+total[i].math+total[i].Russian+total[i].Russian_hearing+total[i].professional+total[i].politics;        i++;        p=p->next;    }    len=i;} void statistics_information()   //数据统计 {    do    {        system("cls");        color(6);        char t;        toxy(45,6);        printf("-----学生档案管理系统-----");        toxy(50,7);        printf("数据统计");        toxy(48,9);        printf("1)  平均分");        toxy(48,11);        printf("2)  总分排名");        toxy(48,13);        printf("3)  各学科不及格人数");        toxy(48,15);        printf("4)  各科成绩分布分析");         toxy(45,17);        printf("按0返回主菜单");        t=getch();        switch(t)        {            case '0':menu();break;            case '1':average_score();break;            case '2':total_score_ranked();break;            case '3':fail_numbers();break;            case '4':grade_table();break;            default :break;        }    }while(1);} void average_score()   //平均分 {    system("cls");    color(10);    float sum_c=0,sum_math=0,sum_Russian=0,sum_Russian_hearing=0,sum_professional=0,sum_politics=0;    float average_c,average_math,average_Russian,average_Russian_hearing,average_professional,average_politics;    int i=0;    Stup head,p;    head=ss();    p=head;    while(p!=NULL)    {        sum_c+=p->score.c_language;        sum_math+=p->score.math;        sum_Russian+=p->score.Russian;        sum_Russian_hearing+=p->score.Russian_hearing;        sum_professional+=p->score.professional;        sum_politics+=p->score.politics;        p=p->next;        i++;    }    average_c=sum_c*1.0/i;    average_math=sum_math*1.0/i;    average_Russian=sum_Russian*1.0/i;    average_Russian_hearing=sum_Russian_hearing*1.0/i;    average_professional=sum_professional*1.0/i;    average_politics=sum_politics*1.0/i;    toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(48,7);    printf("各学科平均分");    toxy(30,8);    printf("----------------------------------------------------");    toxy(30,9);    printf("  c语言   高数   俄语   俄语听力   专业导论   政治");    toxy(30,10);    printf("----------------------------------------------------");    toxy(30,11);    printf("  %.2f   %.2f  %.2f    %.2f     %.2f    %.2f",average_c,average_math,average_Russian,average_Russian_hearing,average_professional,average_politics);    toxy(45,12);    printf("总人数为：%d",i);    toxy(50,13);    printf("按任意键返回主菜单");    getch();     } void total_score_ranked()  //总分排名 {    system("cls");    color(10);    assignment();    int j,k=11;    qsort(total,len,sizeof(Total),cmp);   //快速排序     toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(48,7);    printf("总分排名");    toxy(20,8);    printf("--------------------------------------------------------------------------------------------");    toxy(20,9);    printf("学号   姓名   性别     c语言    高 数    俄 语   俄语听力   专业导论   政 治     总分   名次");    toxy(20,10);    printf("--------------------------------------------------------------------------------------------");    for(j=0;j<len;j++)    {        toxy(20,k);        printf("%s     %s    %s      %.2f    %.2f    %.2f    %.2f      %.2f     %.2f    %.2f    %d\n",total[j].number,total[j].name,total[j].sex,total[j].c_language,total[j].math,total[j].Russian,total[j].Russian_hearing,total[j].professional,total[j].politics,total[j].sum,j+1);        k++;    }    toxy(45,k);    printf("按任意键返回主菜单");    getch();} void fail_numbers()   //各科不及格人数 {    system("cls");    color(10);    int fail_c=0,fail_math=0,fail_Russian=0,fail_Russian_hearing=0,fail_professional=0,fail_politics=0;     int i;    assignment();    for(i=0;i<len;i++)    {        if(total[i].c_language<60)            fail_c++;        if(total[i].math<60)            fail_math++;        if(total[i].Russian<60)            fail_Russian++;        if(total[i].Russian_hearing<60)            fail_Russian_hearing++;        if(total[i].professional<60)            fail_professional++;        if(total[i].politics<60)            fail_politics++;    }    toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(48,7);    printf("各科不及格人数");    toxy(30,8);    printf("-----------------------------------------------------");    toxy(30,9);    printf("c语言    高 数    俄 语   俄语听力   专业导论   政 治");    toxy(30,10);    printf("-----------------------------------------------------");    toxy(30,11);    printf("%-10d%-10d%-10d%-10d%-10d%-10d",fail_c,fail_math,fail_Russian,fail_Russian_hearing,fail_professional,fail_politics);    toxy(45,12);    printf("请按任意键返回");    getch();} void grade_table()    //各科各分数段人数信息统计 {    do    {        system("cls");        color(10);        char t;        toxy(45,6);        printf("-----学生档案管理系统-----");        toxy(50,7);        printf("各分数段统计");        toxy(48,9);        printf("(1)  c语言");        toxy(48,11);        printf("(2)  高等数学");        toxy(48,13);        printf("(3)  俄语");        toxy(48,15);        printf("(4)  俄语听力");        toxy(48,17);        printf("(5)  专业导论");        toxy(48,19);        printf("(6)  政治");        toxy(48,21);        printf("按0返回上一级");        t=getch();        switch(t)        {            case '0':statistics_information();break;            case '1':analyze_c();break;            case '2':analyze_math();break;            case '3':analyze_Russian();break;            case '4':analyze_Russian_hearing();break;            case '5':analyze_professional();break;            case '6':analyze_politics();break;            default :break;        }    }while(1);} void analyze_c()  //c语言 {    system("cls");    color(11);    assignment();    qsort(total,len,sizeof(Total),cmp1);   //快速排序     int numbers_A=0,numbers_B=0,numbers_C=0,numbers_D=0,numbers_E=0;    int i,j,k=12;    for(i=0;i<len;i++)    {        switch((int)(total[i].c_language/10))        {            case 10:            case 9:numbers_A++;break;            case 8:numbers_B++;break;            case 7:numbers_C++;break;            case 6:numbers_D++;break;            default:numbers_E++;break;        }    }    toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(50,7);    printf("c语言--各分数段统计");    toxy(36,9);    printf("-------------------------------------------------");    toxy(36,10);    printf("学号           姓名           性别           分数");    toxy(36,11);    printf("-------------------------------------------------");    toxy(18,12);    printf("90~100人数为：%d",numbers_A);    for(j=0;j<numbers_A;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].c_language);        k++;    }    k++;    toxy(18,k);    printf("80~90人数为：%d",numbers_B);    for(j=numbers_A;j<numbers_A+numbers_B;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].c_language);        k++;    }    k++;    toxy(18,k);    printf("70~80人数为：%d",numbers_C);    for(j=numbers_A+numbers_B;j<numbers_A+numbers_B+numbers_C;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].c_language);        k++;    }    k++;    toxy(18,k);    printf("60~70人数为：%d",numbers_D);    for(j=numbers_A+numbers_B+numbers_C;j<numbers_A+numbers_B+numbers_C+numbers_D;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].c_language);        k++;    }    k++;    toxy(18,k);    printf("0~60人数为：%d",numbers_E);    for(j=numbers_A+numbers_B+numbers_C+numbers_D;j<len;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].c_language);        k++;    }    toxy(48,k);    printf("按任意键返回上一级");    getch();}  void analyze_math()  //高数 {    system("cls");    color(11);    assignment();    qsort(total,len,sizeof(Total),cmp2);   //快速排序     int numbers_A=0,numbers_B=0,numbers_C=0,numbers_D=0,numbers_E=0;    int i,j,k=12;    for(i=0;i<len;i++)    {        switch((int)(total[i].math/10))        {            case 10:            case 9:numbers_A++;break;            case 8:numbers_B++;break;            case 7:numbers_C++;break;            case 6:numbers_D++;break;            default:numbers_E++;break;        }    }    toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(50,7);    printf("高数--各分数段统计");    toxy(36,9);    printf("-------------------------------------------------");    toxy(36,10);    printf("学号           姓名           性别           分数");    toxy(36,11);    printf("-------------------------------------------------");    toxy(18,12);    printf("90~100人数为：%d",numbers_A);    for(j=0;j<numbers_A;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].math);        k++;    }    k++;    toxy(18,k);    printf("80~90人数为：%d",numbers_B);    for(j=numbers_A;j<numbers_A+numbers_B;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].math);        k++;    }    k++;    toxy(18,k);    printf("70~80人数为：%d",numbers_C);    for(j=numbers_A+numbers_B;j<numbers_A+numbers_B+numbers_C;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].math);        k++;    }    k++;    toxy(18,k);    printf("60~70人数为：%d",numbers_D);    for(j=numbers_A+numbers_B+numbers_C;j<numbers_A+numbers_B+numbers_C+numbers_D;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].math);        k++;    }    k++;    toxy(18,k);    printf("0~60人数为：%d",numbers_E);    for(j=numbers_A+numbers_B+numbers_C+numbers_D;j<len;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].math);        k++;    }    toxy(48,k);    printf("按任意键返回上一级");    getch();} void analyze_Russian()   //俄语 {    system("cls");    color(11);    assignment();    qsort(total,len,sizeof(Total),cmp3);   //快速排序     int numbers_A=0,numbers_B=0,numbers_C=0,numbers_D=0,numbers_E=0;    int i,j,k=12;    for(i=0;i<len;i++)    {        switch((int)(total[i].Russian/10))        {            case 10:            case 9:numbers_A++;break;            case 8:numbers_B++;break;            case 7:numbers_C++;break;            case 6:numbers_D++;break;            default:numbers_E++;break;        }    }    toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(50,7);    printf("俄语--各分数段统计");    toxy(36,9);    printf("-------------------------------------------------");    toxy(36,10);    printf("学号           姓名           性别           分数");    toxy(36,11);    printf("-------------------------------------------------");    toxy(18,12);    printf("90~100人数为：%d",numbers_A);    for(j=0;j<numbers_A;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian);        k++;    }    k++;    toxy(18,k);    printf("80~90人数为：%d",numbers_B);    for(j=numbers_A;j<numbers_A+numbers_B;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian);        k++;    }    k++;    toxy(18,k);    printf("70~80人数为：%d",numbers_C);    for(j=numbers_A+numbers_B;j<numbers_A+numbers_B+numbers_C;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian);        k++;    }    k++;    toxy(18,k);    printf("60~70人数为：%d",numbers_D);    for(j=numbers_A+numbers_B+numbers_C;j<numbers_A+numbers_B+numbers_C+numbers_D;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian);        k++;    }    k++;    toxy(18,k);    printf("0~60人数为：%d",numbers_E);    for(j=numbers_A+numbers_B+numbers_C+numbers_D;j<len;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian);        k++;    }    toxy(48,k);    printf("按任意键返回上一级");    getch();} void analyze_Russian_hearing()  //俄语听力 {    system("cls");    color(11);    assignment();    qsort(total,len,sizeof(Total),cmp4);   //快速排序     int numbers_A=0,numbers_B=0,numbers_C=0,numbers_D=0,numbers_E=0;    int i,j,k=12;    for(i=0;i<len;i++)    {        switch((int)(total[i].Russian_hearing/10))        {            case 10:            case 9:numbers_A++;break;            case 8:numbers_B++;break;            case 7:numbers_C++;break;            case 6:numbers_D++;break;            default:numbers_E++;break;        }    }    toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(50,7);    printf("俄语听力--各分数段统计");    toxy(36,9);    printf("-------------------------------------------------");    toxy(36,10);    printf("学号           姓名           性别           分数");    toxy(36,11);    printf("-------------------------------------------------");    toxy(18,12);    printf("90~100人数为：%d",numbers_A);    for(j=0;j<numbers_A;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian_hearing);        k++;    }    k++;    toxy(18,k);    printf("80~90人数为：%d",numbers_B);    for(j=numbers_A;j<numbers_A+numbers_B;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian_hearing);        k++;    }    k++;    toxy(18,k);    printf("70~80人数为：%d",numbers_C);    for(j=numbers_A+numbers_B;j<numbers_A+numbers_B+numbers_C;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian_hearing);        k++;    }    k++;    toxy(18,k);    printf("60~70人数为：%d",numbers_D);    for(j=numbers_A+numbers_B+numbers_C;j<numbers_A+numbers_B+numbers_C+numbers_D;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian_hearing);        k++;    }    k++;    toxy(18,k);    printf("0~60人数为：%d",numbers_E);    for(j=numbers_A+numbers_B+numbers_C+numbers_D;j<len;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].Russian_hearing);        k++;    }    toxy(48,k);    printf("按任意键返回上一级");    getch();} void analyze_professional()  //专业导论 {    system("cls");    color(11);    assignment();    qsort(total,len,sizeof(Total),cmp5);   //快速排序     int numbers_A=0,numbers_B=0,numbers_C=0,numbers_D=0,numbers_E=0;    int i,j,k=12;    for(i=0;i<len;i++)    {        switch((int)(total[i].professional/10))        {            case 10:            case 9:numbers_A++;break;            case 8:numbers_B++;break;            case 7:numbers_C++;break;            case 6:numbers_D++;break;            default:numbers_E++;break;        }    }    toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(50,7);    printf("专业导论--各分数段统计");    toxy(36,9);    printf("-------------------------------------------------");    toxy(36,10);    printf("学号           姓名           性别           分数");    toxy(36,11);    printf("-------------------------------------------------");    toxy(18,12);    printf("90~100人数为：%d",numbers_A);    for(j=0;j<numbers_A;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].professional);        k++;    }    k++;    toxy(18,k);    printf("80~90人数为：%d",numbers_B);    for(j=numbers_A;j<numbers_A+numbers_B;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].professional);        k++;    }    k++;    toxy(18,k);    printf("70~80人数为：%d",numbers_C);    for(j=numbers_A+numbers_B;j<numbers_A+numbers_B+numbers_C;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].professional);        k++;    }    k++;    toxy(18,k);    printf("60~70人数为：%d",numbers_D);    for(j=numbers_A+numbers_B+numbers_C;j<numbers_A+numbers_B+numbers_C+numbers_D;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].professional);        k++;    }    k++;    toxy(18,k);    printf("0~60人数为：%d",numbers_E);    for(j=numbers_A+numbers_B+numbers_C+numbers_D;j<len;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].professional);        k++;    }    toxy(48,k);    printf("按任意键返回上一级");    getch();} void analyze_politics()  //政治 {    system("cls");    color(11);    assignment();    qsort(total,len,sizeof(Total),cmp6);   //快速排序     int numbers_A=0,numbers_B=0,numbers_C=0,numbers_D=0,numbers_E=0;    int i,j,k=12;    for(i=0;i<len;i++)    {        switch((int)(total[i].politics/10))        {            case 10:            case 9:numbers_A++;break;            case 8:numbers_B++;break;            case 7:numbers_C++;break;            case 6:numbers_D++;break;            default:numbers_E++;break;        }    }    toxy(45,6);    printf("-----学生档案管理系统-----");    toxy(50,7);    printf("政治--各分数段统计");    toxy(36,9);    printf("-------------------------------------------------");    toxy(36,10);    printf("学号           姓名           性别           分数");    toxy(36,11);    printf("-------------------------------------------------");    toxy(18,12);    printf("90~100人数为：%d",numbers_A);    for(j=0;j<numbers_A;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].politics);        k++;    }    k++;    toxy(18,k);    printf("80~90人数为：%d",numbers_B);    for(j=numbers_A;j<numbers_A+numbers_B;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].politics);        k++;    }    k++;    toxy(18,k);    printf("70~80人数为：%d",numbers_C);    for(j=numbers_A+numbers_B;j<numbers_A+numbers_B+numbers_C;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].politics);        k++;    }    k++;    toxy(18,k);    printf("60~70人数为：%d",numbers_D);    for(j=numbers_A+numbers_B+numbers_C;j<numbers_A+numbers_B+numbers_C+numbers_D;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].politics);        k++;    }    k++;    toxy(18,k);    printf("0~60人数为：%d",numbers_E);    for(j=numbers_A+numbers_B+numbers_C+numbers_D;j<len;j++)    {        toxy(36,k);        printf("%s             %s           %s             %.2f",total[j].number,total[j].name,total[j].sex,total[j].politics);        k++;    }    toxy(48,k);    printf("按任意键返回上一级");    getch();} void save_information(Stup p)   //将p所指向的内容写入文件中 {    FILE *fp;    fp=fopen("student","ab+");    if(fp==NULL)    {        printf("cannot open file");     }    if(fwrite(p,N,1,fp)!=1)    {        printf("write error");    }     fclose(fp);} void over()       //退出软件 {    char t;    toxy(45,11);    printf("--------------------------");    toxy(45,12);    printf("|    您确定要退出吗？    |");    toxy(45,14);    printf("|  1.确定      2.取消    |");    toxy(45,15);    printf("--------------------------");    while(1)    {        t=getch();         //输入t        switch(t)        {            case '1':            system("cls");            color(6);            toxy(48,10);            printf("正在安全退出....");            Sleep(1000);     //暂停1秒             system("cls");            color(8);            toxy(48,10);            printf("已安全退出软件");            toxy(48,12);            printf("谢谢使用！");            toxy(48,14);            printf("by-by^_^");            free(password_head);            exit(0);  break; //终止程序             case '2':            menu(); break;   //调用函数，进入菜单             default :break;        }    }} main()  //简单明了的主函数^_^ {    HideCursor();    signin();  //登录界面 }