/* A simple Function */

/* preprocessor directive */
#include <stdio.h>
#include "checkit.h"

#define MY_FAVORITE_NUMBER  4


int f(int x, int y) {

 return (x*x + x*y - 20);

}


int main() {

 checkit_int(f(4,4),12);
 checkit_int(f(0,0),-20);
 checkit_int(f(1,1), -18);

 return (0);
}