#include <stdio.h>

int f (int, int);
int gcd (int, int);

int test (int a, int b)
{
	return a + b;
}

int main()
{
	int a, b, c;
	c = test (1, 2);

	printf ("2 integrs pls.: ");
	scanf ("%d%d", &a, &b);
	c = f (a, b);
	printf ("f says: %d\n", c);
	c = gcd (a, b);
	printf ("gcd says: %d\n", c);
	return 0;
}