How can i short my if else code which cointais value of variable?

i am trying to short the code but now this is not working. i need to short the code for it’s run time.Is there nayone who can told me the error of this code and solution of this code.

# include <stdio.h>
int main( )
{
    int bonus, cy, yoj, yos ;
    printf ( "Enter current year and year of joining " ) ;
    scanf ( "%d %d", &cy, &yoj ) ;
    yos = cy - yoj ;
    ( yos > 3 )? bonus=100:printf ( "Bonus = Rs. %d\n", bonus );
    
    return 0 ;
}

>Solution :

It does not work like this.

As you do not mention what should happen if yos < 3 I decided to set bonus to 0.

printf ( "Bonus = Rs. %d\n", bonus = ( yos > 3 ) ? 2500 : 0 );