Calculation of bonus

/* Calculation of bonus */

#include<stdio.h>
#include<conio.h>
main( )
{
 int   bonus, cy, yoj, yr_of_ser ;

 printf ( "Enter current year and year of joining " ) ;
 scanf ( "%d %d", &cy, &yoj ) ;

 yr_of_ser = cy - yoj ;

 if ( yr_of_ser > 3 )
 {
  bonus = 2500 ;
  printf ( "Bonus = Rs. %d", bonus ) ;
 }
}