C++ 引用和指针作为函数参数的例子。请不要拍砖

#include <iostream>
#include <string>
using namespace std;

void referenceTest(int &a, int &b)
{
    a=4;
    b=5;
}
void pointerTest(string *a, string *b)
{
    string kk="abc";
    a=&kk;
    *b="5";
}
                 
int main()
{
    int x=0, y=0;
    referenceTest(x,y);
    cout<<"x="<<x<<",y="<<y<<endl;

    string a="0", b="0";
    string *aa=&a, *bb=&b;
    pointerTest(aa,bb);
    cout<<"aa="<<*aa<<",bb="<<*bb<<endl;   // out put: aa=4, bb=5
    cout<<"a="<<a<<",b="<<b<<endl;         // out put：a=0,b=5  

    return 0;
}