代碼給出了控制檯

Question

我運行下面的代碼，但得到的控制檯屏幕上沒有輸出沒有輸出。請解釋：

#include <stdio.h> 

void main() 
{ 
    enum days {sun,mon,tue,wed,thru,fri,sat}; 
} 

Answer 1

#include <stdio.h> 
int main() 
{ 
    printf("sun, mon, tue, wed, thru, fri, sat\n"); 
    return 0; 
} 

難道這就是你想幹什麼？

Answer 2

枚舉被用作用戶定義的數據類型。您可以使用以下語法創建自己的數據類型。枚舉可以用來設置命名整型常量的集合。

enum datatype_name {val1,val2,val3,...,valN}; 

默認枚舉值將從0。這裏產生，

val1=0; //val1 is a named constant holding value 0 
val2=1; //val2 is a named constant holding value 1 
valN=N-1; //valN is a named constant holding value N-1 

支票默認枚舉行爲下面的代碼。

#include<stdio.h> 
//Define user defined data type. Here days is the datatype. sun,mon,...,sat are named constants. 
enum days{sun,mon,tue,wed,thu,fri,sat}; 
int main() 
{ 
    printf("%d",wed); //wed is a named constant with default value 3 
    return 0; 
} 
Output: 3 

初始化enum的自定義值。

#include<stdio.h> 
enum days{sum=100,mon=200,tue=300,wed=400,thu=500,fri=600,sat=700}; 
int main() 
{ 
    printf("%d",wed); //wed is a named constant with user defined value 400 
    return 0; 
} 
Output: 400 

您可以創建一個布爾值枚舉。

enum boolean{ false,true}; 
int main() 
{ 
    printf("false=%d",false); //false is constant that holds default value 0 
    printf("\ntrue=%d",true); //true is constant that holds default value 1 
    return 0; 
} 
Output: 
    false=0 
    true=1