我们使用在C

Question

枚举我有这样的枚举：

enum Seasons{ 
    winter,spring,summer,autumn 
    }; 

什么将这段代码呢？

enum Seasons curr_season; 
curr_season = autumn; 
curr_season = 19; 

谢谢！

Answer 1

enum Seasons{ 
    winter,spring,summer,autumn 
}; 

上面创建以下

winter=0, spring=1, summer=2 and autumn=3 

注：enums只是整数！ ..它也可以带负数！

enum Seasons curr_season; 
curr_season = autumn; 
/* curr_season will now have 3 assigned */ 

curr_season = 19; 
/* curr_season will now have 19 assigned */ 

你可以运行下面的代码来检查这个！

#include <stdio.h> 

enum Seasons{ 
     winter,spring,summer,autumn 
}; 

void print_seanons(void) 
{ 
    printf("winter = %d \n", winter); 
    printf("spring = %d \n", spring); 
    printf("summer = %d \n", summer); 
    printf("autumn = %d \n", autumn); 
    return; 
} 

int main(void) 
{ 
    enum Seasons curr_season; 
    print_seanons(); 

    curr_season = autumn; 
    printf("curr_season = %d \n", curr_season); 
    curr_season = 19; 
    printf("curr_season = %d \n", curr_season); 
    return 0; 

} 

Answer 2

枚举常数是在C int类型。虽然enum s为未明确int类型，并且int小号枚举类型之间的转换，是无声的。通常没有约束的枚举检查，所以你的代码在功能上等同于：

int curr_season; 
curr_season = 3; 
curr_season = 19; 

Answer 3

枚举是整数值，所以它会值19分配给curr_season。

交叉使用（将整数值指派给一个枚举）被认为是实践编程差，应该避免。