c语言：判断是不是闰年

#include <stdio.h>#include <stdlib.h>
int Leapyear(int year) {
int flag=0;
if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
flag = 1;
}
return flag;
}
int main() {
int year,flag;
printf("请输入年份\n");
scanf("%d", &year);
flag=Leapyear(year);
if (flag == 0) {
printf("不是闰年\n");
}
if (flag == 1) {
printf("是闰年\n");
}
system("pause");
return 0;
}