#include <stdio.h>

int main()
{
  int x = 10;
  int * pX = &x;
  printf("int value: %d\n", x);
  printf("int address: %p\n", pX);
  *pX = 15;
  printf("int value after modifing pointer: %d\n", x);
  printf("int address: %p\n", pX);
  x = 20;
  printf("int value: %d\n", x);
  printf("int value from pointer: %d\n", *pX);
  printf("int address: %p\n", pX);

  char *p = "Hello";
  printf("Char value: %s\n", p);
  printf("Char address: %p", &p);
  char p_value = *p;
  printf("Char p_value: %c\n", p_value);
  return 0;
}