吴裕雄--天生自然C语言开发：enum(枚举)

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

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

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

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

#include<stdio.h>

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

int main()
{
    enum DAY day;
    day = WED;
    printf("%d",day);
    return ;
}

#include<stdio.h>

enum DAY
{
      MON=, 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 = ,
    ENUM_11
};

#include <stdio.h>
#include <stdlib.h>
int main()
{

    enum color { red=, green, blue };

    enum  color favorite_color;

    /* ask user to choose color */
    printf("请输入你喜欢的颜色: (1. red, 2. green, 3. blue): ");
    scanf("%d", &favorite_color);

    /* 输出结果 */
    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 ;
}

#include <stdio.h>
#include <stdlib.h>

int main()
{

    enum day
    {
        saturday,
        sunday,
        monday,
        tuesday,
        wednesday,
        thursday,
        friday
    } workday;

    int a = ;
    enum day weekend;
    weekend = ( enum day ) a;  //类型转换
    //weekend = a; //错误
    printf("weekend:%d",weekend);
    return ;
}