Leap year

#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;
}

Output:
Enter a year to check if it is a leap year 2012
2012is a leap year