C++ primer-练习6.22

编写一个函数，令其交换两个int指针。

#include<iostream>using namespace std;void swap(int **pi, int **pj);int main(){int i = 9, j = 6;int *pi = &i, *pj = &j;swap(*pi, *pj);cout << *pi << endl;cout << *pj << endl;return 0;}void swap(int **pi, int **pj){int *p = *pi;*pi = *pj;*pj = p;}