c++实验 引用与指针

#include <iostream>

using namespace std;

void swap(int& a, int& b){

int tmp;

tmp = a;

a = b;

b = tmp;

}

void swap(int* a, int* b){

int tmp;

tmp = *a;

*a = *b;

*b = tmp;

}

int main(){

int a=9;

int b=10;

cout<<"a:"<<a<<" "<<"b:"<<b<<endl;

swap(a, b);

cout<<"a:"<<a<<" "<<"b:"<<b<<endl;

swap(&a, &b);

cout<<"a:"<<a<<" "<<"b:"<<b<<endl;

return 0;

}