9_4.bak

文件打开关闭

#include<stdio.h>
#define LEAP_YEAR(y) ((y%400==0)||((y%4==0)&&(y%100!=0)))?1:0
						
main(){
int year;
scanf("%d",&year);
if(LEAP_YEAR(year)) printf("%d is a leap year",year);
	else printf("%d is not a leap year",year);
}