#ifndef BOY_H
#define BOY_H

#include <iostream>
#include <string>
#include "Girl.h"

using namespace std;

class Boy
{
public:
    Boy(){}
    Boy(string name, string phone, string face);

    string m_strFace;
    //若將一個(gè)類申明為友元，
    //則在該類所有函數(shù)中都可以訪問Boy的私有數(shù)據(jù)
    friend class Girl;
    //若將一個(gè)類中的某個(gè)成員函數(shù)申明為友元
    //則只能在該函數(shù)中訪問Boy的私有數(shù)據(jù)
    //friend void Girl::getBoyName(Boy &boy);

    //友元函數(shù)
    //在友元函數(shù)可以通過對(duì)象直接訪問和操作該對(duì)象的私有數(shù)據(jù)
    //友元破壞了類的封裝性，盡量不要用
    friend void fun(Boy &boy);

private:
    string m_strName;
    string m_strPhone;
};
void fun(Boy &boy);

#endif

#ifndef GIRL_H
#define GIRL_H

#include <iostream>
#include <string>


using namespace std;

class Boy;

class Girl
{
public:
    void getBoyName(Boy &boy);
    void getBoyPhone(Boy &boy);
};

#endif

#include "Girl.h"
#include "boy.h"

void Girl::getBoyName(Boy &boy)
{
    cout << boy.m_strName << endl;
}
void Girl::getBoyPhone(Boy &boy)
{
    cout << boy.m_strPhone << endl;
}