Someone

#include <stdio.h>

long *p;

void a(void);
void b(void);
void c(void);

int main(void)
{
	long m = 10;
	p = &m;
	printf("&m = %p\n", p);
	a();
	
	return 0;
}

void a(void)
{
	long a = 20;
	printf("&a = %p\n", &a);
	b();
}

void b(void)
{
	long b = 30;
	printf("&b = %p\n", &b);
	c();
}

void c(void)
{
	long c = 40;
	printf("&c = %p\n\n", &c);
	printf("a = %ld\n", *(long*)(p - 4));
	printf("b = %ld\n", *(long*)(p - 8));
	printf("c = %ld\n", *(long*)(p - 12));
}