569529989 发表于 2016-7-14 22:56:02

友元关系

代码编译不过！
#include <iostream>
#include <string>

class Lovers
{
public:
    Lovers(std::string theName);
    void kiss(Lovers *lover);
    void ask(Lovers *lover, std::string something);

protected:
    std::string name;

    friend class Others;
};

class Boyfriend : public Lovers
{
public:
    Boyfriend(std::string theName);
};

class Girlfriend : public Lovers
{
public:
    Girlfriend(std::string theName);
};

class Others
{
public:
    Others(std::string theName);
    void kiss(Lovers *lover);

protected:
    std::string name;
};

Lovers::Lovers(std::string theName)
{
    name = theName;
}

void Lovers::kiss(Lovers *lover)
{
    std::cout << name << "亲亲我们家的" << lover->name << std::endl;
}

void Lovers::ask(Lovers *lover, std::string something)
{
    std::cout << "宝贝儿" << lover->name << "帮我" << something << std::endl;
}

Boyfriend::Boyfriend(std::string theName)
{
}

Girlfriend::Girlfriend(std::string theName)
{
}

Others::Others(std::string theName)
{
    name = theName;
}

void Others::kiss(Lovers *lover)
{
    std::cout << name << "亲一下" << lover->name << std::endl;
}

int main()
{
    Boyfriend boyfriend("A君");
    Girlfriend girlfriend("B妞");

    Others others("路人甲");

    girlfriend.kiss(&boyfriend);
    girlfriend.ask(&boyfriend, "洗衣服啦~");

    std::cout << "\n当当当当! 传说中的路人甲登场......\n";
    others.kiss(&girlfriend);

    return 0;
}

Krant5 发表于 2016-7-14 23:37:14

本帖最后由 Krant5 于 2016-7-14 23:38 编辑

你的两个构造器有问题，boyfriend 类构造器后面应该跟 ：Lovers(theName),同理Grilfriend类构造器后面也一样，子类构造器也要初始化父类

569529989 发表于 2016-7-15 20:58:32

Krant5 发表于 2016-7-14 23:37
你的两个构造器有问题，boyfriend 类构造器后面应该跟 ：Lovers(theName),同理Grilfriend类构造器后面也一 ...

soo~~ ga~~万分感谢！
的确Boyfriend和Girlfriend的构造器都是继承自Lovers，忘了这个语法，哈哈{:10_277:}
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