判断闰年

一、算法：

二、实现：

#include <stdio.h>

int
leap_year(int year)
{
    return(((0 == year%4) && (0 != year%100)) || (0 == year%400));
}

#ifdef TEST
int main()
{
    int year = 2000;

    if(leap_year(year))
        printf("yes\n");
    else
        printf("no\n");

    return ;
}
#endif