C语言中二级指针的实例详解

#include <stdio.h>

int main(int argc, const char * argv[])
{

  //
  int a = 5;
  int *p1 = &a;
  //-打印地址-----地址相同---------------
  printf("&a = %p\n", &a);//
  printf("p1 = %p\n", p1);//

  int **p2 = &p1;

  //-打印地址---地址相同---------------
  printf("&p1 = %p\n", &p1);//
  printf("p2 = %p\n", p2);//

  //-打印值---------------------
  printf("a = %d\n", a); // = 5;
  printf("*p1 = %d\n", *p1); // = 5;
  printf("**p2 = %d\n", **p2); // = 5;


  printf("\n");
  return 0;
}