指针的引用练习

#include <iostream>
#include <string>

using namespace std;

void ptrswap(int *&v1, int *&v2)//交换指针所指的地址
{
    cout << endl;
    cout << *v1 << "\t\t" << *v2 << endl;
    int *tmp = v1;
    v1 = v2;
    v2 = tmp;
    cout << *v1 << "\t\t" << *v2 << endl;
    cout << endl;
}

int main()
{
    int i = 10;
    int j = 20;
    int *pi = &i;
    int *pj = &j;
    cout << *pi << "\t\t" << *pj << endl;
    ptrswap(pi, pj);
    cout << *pi << "\t\t" << *pj << endl;
    return 0;
}