leap year

#include <stdio.h>

void main ()
{
    int year;

    printf ("enter a year want to check:");
    scanf("%d",&year);

    if (year % 400==0)
        printf("%d is  a leap year",year);

    else if(year % 100 ==0)

        printf("%d is not leap year ",year);

    else if (year % 4 == 0)

            printf("%d is  a leap year",year);
    else
        printf("%d is not leap year ",year);

    return 0;
}