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 = %pn",&a);//
  printf("p1 = %pn",p1);//

  int **p2 = &p1;

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

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


  printf("n");
  return 0;
}