#include <stdio.h>

int F (int *a, int b);
void G (int *b);

main() {
	int a, b, c;
	int *ptrX, *ptrY;

	a = 2; b = 10; c = 5;
	ptrX = &a;

	printf("init: a = %d, b = %d, c = %d\n",a,b,c);
	G(&c);
	c = F(ptrX, b); 
	printf("main: a = %d, b = %d, c = %d\n",a,b,c);
}
int F (int *ptr, int varOne) {
	int varTwo;
	varTwo = 3 * *ptr + 6;
	G(ptr);
	printf("F: *ptr = %d, varOne = %d, varTwo = %d\n",*ptr, varOne, varTwo);
	return (varTwo);
}
void G (int *ptr) {
	int a, b;
	b = *ptr + 9;
	*ptr = 3 * b;
	a = b - 7; 
	printf("G: a = %d, *ptr = %d, b = %d\n", a, *ptr, b);
	return;
}