Leap Year program in c language

Leap Year program in c language:

#include
main()
{
    int year;
    printf("Enter year: ");
    scanf("%d",&year);
    if(year%4==0){
        if(year%100==0){
            if(year%400==0){
                printf("%d is a leap year",year);
            }
            else{
                printf("%d is not a leap year",year);
            }
        }
        else{
            printf("%d is a leap year",year);
        }
    }
    else{
        printf("%d is not a leap year",year);
    }
}