建立枚舉類型Weekday,假設今日爲星期二，計算10天后爲星期幾。

1、         建立枚舉類型Weekday,假設今日爲星期二，計算10天后爲星期幾。

#include<stdio.h>
typedef enum week{SUN,MON,TUE,WEN,THU,FRI,STA}Weekday;
int main(){
Weekday day,tenday;
int n;
day=SUN;
printf("輸入數字：\n");
scanf("%d",&n);
tenday=(Weekday)((day+n+10)%7);
switch(tenday)
{
case SUN: printf("10天后是星期天\n"); break;
case MON: printf("10天后是星期一\n"); break;
case TUE: printf("10天后是星期二\n"); break;
case WEN: printf("10天后是星期三\n"); break;
case THU: printf("10天后是星期四\n"); break;
case FRI: printf("10天后是星期五\n"); break;
case STA: printf("10天后是星期六\n"); break;
}
return 0;
}