【经典C程序】判断闰年

What is leap year?

Leap year is a year which has 366 days. Leap year occurs once every 4 years.

How to find whether a year is leap year or not using a C program?

• A year which can be exactly divisable by 4 except century years is called leap year.
• Century year means the year which ends with 00. Century year also can be a leap year if it is exactly divisable by 400.

vim leapyear.c

#include 

int main()
{
        int year;
        printf("Please enter a year to check whether it is a leap year or not: ");

        scanf("%d", &year);

        if (year % 400 == 0)
        {
                printf("%d is a leap year.n", year);
        }
        else if (year % 100 == 0)
        {
                printf("%d is a leap year.n", year);
        }
        else if (year % 4 == 0)
        {
                printf("%d is a leap year.n", year);
        }
        else
        {
                printf("%d is not a leap year.n", year);
        }
        return 0;

}