c语言中实现数组几个数求次大值

#include<stdio.h>
int main()
{
    int a[] = { 7, 4, 9, 9, 6 };
    int len = sizeof(a) / sizeof(int);//求数组元素个数
    int max_subscript = 0;//设置最大值下标为0,为数组第一个数
    int second_subscript = 1;//设置次大值下标为1，为数组第二个数
    
    while (1)
    {
    
        for (int i = 0; i < len;i++)//从下标1（即第二个元素开始遍历）开始遍历
        {
            if (max_subscript == i)
            {
                continue;//跳过原来最大值的下标，直接开始i+1的循环
            }
            
            if (a[i]>a[max_subscript])//遍历的值a[i]比最大值都大那么此时的最大值为a[i],次大值为原来的最大值即a[max_subscript]
            {            
                second_subscript = max_subscript;//先赋值次大值为原来的最大值
                max_subscript = i;//赋值现在的最大值为a[i]
            }
            else
            {
                
                    if (a[i] > a[second_subscript])
                    {
                        second_subscript = i;
                    }
            }
 
        }
        if (a[max_subscript] != a[second_subscript])
        {
            
            break;  //最大值和次大值不相等就跳出循环，
        }
        a[second_subscript] = 0;//相等就把次大值得值重置为0
    }
    printf("最大值a[max_subscript]=%d,次大值a[second_subscript]=%d\n", a[max_subscript], a[second_subscript]);
    printf("最大值下标max_subscript=%d,次大值下标second_subscript=%d\n", max_subscript, second_subscript);
    getchar();
    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <ctype.h>
 
int main()
{
    // please write your code here
    char oriInput[200] = {0};
    int inputInt[100] = {0};
    fgets(oriInput,200,stdin);
    int len = strlen(oriInput);
    int i=0,k=0;
    int fimax=0,semax=0;
    char *pStart = oriInput;
    for(i=0; i<len; i++)
    {
        if(oriInput[i] == ' ')
        {
            oriInput[i] = '\0';
            inputInt[k++] = atoi(pStart);
            pStart = &oriInput[i+1];
        }
    }
    inputInt[k] = atoi(pStart);
    for(i=0; i<=k; i++)
    {
        if(fimax < inputInt[i])
            fimax = inputInt[i];
    }
    for(i=0; i<=k; i++)
    {
        if(semax < inputInt[i] && inputInt[i] != fimax)
            semax = inputInt[i];
    }
    if(fimax == semax)
        semax = 0;
    printf("%d %d",fimax,semax);
    return 0;
}