C Program to check leap year or not

#include

void main()

{

    int year;

    printf("Enter a year \n");

    scanf("%d", &year);

    if ((year % 400) == 0)

        printf("%d is a leap year \n", year);

    else if ((year % 100) == 0)

        printf("%d is a not 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);
}