#include <stdio.h> int main() { int year; printf("输入年份: "); scanf("%d",&year); if(year%4 == 0) { if( year%100 == 0) { // 这里如果被 400 整数是闰年 if ( year%400 == 0) printf(" leap year", year); else printf("not leap year", year); } else printf("leap year", year ); } else printf("not leap year", year); return 0; }