C Leap Year Program: Complete Guide

The condition for determining if a year is a leap year is:

1. A year is a leap year if it can be divided by 4 but not by 100.
2. A year that can be evenly divided by 400 is also a leap year.

Here is a program written in the C language to determine if it is a leap year:

#include <stdio.h>

int main() {
    int year;
    
    printf("请输入一个年份：");
    scanf("%d", &year);
    
    if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
        printf("%d年是闰年\n", year);
    } else {
        printf("%d年不是闰年\n", year);
    }
    
    return 0;
}

The program will determine if a year inputted by the user is a leap year and display the result.