#include <stdio.h>
#include <stdlib.h>

void squares(int* pa, int* pb) {
	*pa *= *pa;
	*pb *= *pb;
}

int main(int argc, char** argv) {
	int a = 4;
	int b = 0;
	int* pa = &a;
	int* pb = &b;

	printf("a: %d, b: %d, a at %p, b at %p\n", a, b, &a, &b);         /* question a */
	printf("pa: %p, pb: %p, pa at %p, pb at %p\n", pa, pb, &pa, &pb); /* question b */

	*pb = 9;                    /* question c */
	printf("%d %d\n", a, b);

	squares(pa, pb);            /* question d */
	printf("%d %d\n", a, b);

	return EXIT_SUCCESS;
}