C语言中先输入一个日期然后判断是否合法若不合法则继续输入至合法的程序（分年月日输入）

Question

如题所述

Answer 1

#include<stdio.h>
int main()
{int y,m,d,a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
do{printf("Please enter a date(yyyy m d):");
scanf("%d%d%d",&y,&m,&d);
}while(y<1||m<1||m>12||d<1||d>a[m]+(m==2)&(y%4==0&&y%100>0||y%400==0));
printf("%d-%d-%d is a valid date!\n",y,m,d);
return 0;
}