To check leap year in C

#include <stdio.h>

int main()
{
               int year;
               printf("Enter a year to check if it is a leap 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 not 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;
}