C Tutorial/Pointer/NULL Pointer

#include <stdio.h>
int main(void)
{
  int number = 0;                 
  int *pointer = NULL;            
  number = 10;
  printf("\nnumber"s address: %p", &number);            /* Output the address */
  printf("\nnumber"s value: %d\n\n", number);           /* Output the value   */
  return 0;
}