C语言实现enum枚举

#define MON  1
#define TUE  2
#define WED  3
#define THU  4
#define FRI  5
#define SAT  6
#define SUN  7

enum DAY
{
      MON=1, TUE, WED, THU, FRI, SAT, SUN
};

enum season {spring, summer=3, autumn, winter};

enum DAY
{
      MON=1, TUE, WED, THU, FRI, SAT, SUN
};
enum DAY day;

enum DAY
{
      MON=1, TUE, WED, THU, FRI, SAT, SUN
} day;

enum
{
      MON=1, TUE, WED, THU, FRI, SAT, SUN
} day;

#include <stdio.h>
 
enum DAY
{
      MON=1, TUE, WED, THU, FRI, SAT, SUN
};
 
int main()
{
    enum DAY day;
    day = WED;
    printf("%d",day);
    return 0;
}

#include <stdio.h>
 
enum DAY
{
      MON=1, TUE, WED, THU, FRI, SAT, SUN
} day;
int main()
{
    // 遍历枚举元素
    for (day = MON; day <= SUN; day++) {
        printf("枚举元素：%d \n", day);
    }
}

enum
{
    ENUM_0,
    ENUM_10 = 10,
    ENUM_11
};

#include <stdio.h>
#include <stdlib.h>
int main()
{
 
    enum color { red=1, green, blue };
 
    enum  color favorite_color;
 
    
    printf("请输入你喜欢的颜色: (1. red, 2. green, 3. blue): ");
    scanf("%u", &favorite_color);
 
    
    switch (favorite_color)
    {
    case red:
        printf("你喜欢的颜色是红色");
        break;
    case green:
        printf("你喜欢的颜色是绿色");
        break;
    case blue:
        printf("你喜欢的颜色是蓝色");
        break;
    default:
        printf("你没有选择你喜欢的颜色");
    }
 
    return 0;
}

#include <stdio.h>
#include <stdlib.h>
 
int main()
{
 
    enum day
    {
        saturday,
        sunday,
        monday,
        tuesday,
        wednesday,
        thursday,
        friday
    } workday;
 
    int a = 1;
    enum day weekend;
    weekend = ( enum day ) a;  //类型转换
    //weekend = a; //错误
    printf("weekend:%d",weekend);
    return 0;
}