C program to check leap year

C program to check leap year:

A leap year is exactly divisible by 4 except for century years (years ending with 00). The century year is a leap year only if it is perfectly divisible by 400.

#Example

  #include <stdio.h>
  void main()
  {
     int year;

     printf("Enter a year: ");
     scanf("%d",&year);

     if(year % 4 == 0)
     {
        if( year % 100 == 0)
        {
            // year is divisible by 400, hence the year is a leap year
            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);
  }

Output

   Enter a year: 2012
   2012 is a leap year.