PonteiroVariavel.c

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

int main (void){
  
  int a = 2;
  int* p = NULL;
  
  p = &a;
  
  printf ("%d\n", p);
  *p = 3;
  printf ("%d\n", a);
  
  
  return 0;
}