c++ 指针辨析

#include <iostream>

using namespace std;

int main()

{

int i = 5;

int *p = &i;

int b = 6 ;

int *pi = &b; //注意这句话是错的，不能将int值赋值给int * 类型， int *pi = 0的时候，pi代表的是空指针

p = pi;

std::cout << i << " " << p << " " << *p;

//output 5 0x7ffc6fcbf714 6

}