01 #include <stdio.h>
02 
03 int main()
04 {
05     int year;
06 
07     printf("Enter a year to check if it is a leap yearn");
08     scanf("%d", &year);
09 
10     if ( year%400 == 0)
11         printf("%d is a leap year.n", year);
12     else if ( year%100 == 0)
13         printf("%d is not a leap year.n", year);
14     else if ( year%4 == 0 )
15         printf("%d is a leap year.n", year);
16     else
17         printf("%d is not a leap year.n", year);
18 
19     return 0;
20 }

OUTPUT :
 
 (1st Run)
 
 Enter a year to check if it is a leap year
 2004
 2004 is a leap year.
 
 (2nd Run)
 
 Enter a year to check if it is a leap year
 2006
 2006 is not a leap year.