#include <stdio.h>
 
int main(void) {
	// your code goes here
	// int x = 2;
	// int *p;
	// int x = NULL;
	// p = &x;
	// printf("%d", *p);
 
	// int x = 2;
	// int *p; 
	// p = &x;
	// printf("%d, %d, %x, %x, %x", *p, x, p, &x, &p);
 
	int a = 50;
	int *ptr = &a;
	int *q = ptr;
 
	printf("%d, %d, %x, %x, %x, %d", a, *ptr, ptr, &a, q, *q);
 
	// int a = 50;
	// int *ptr = &a;
	// int **q = &ptr;
	// printf("%d, %d, %x, %x, %x, %d", a, *ptr, ptr, &a, *q, *(*q));
 
	return 0;
}
 

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