Question

我迷失了这段代码，我需要为

做些什么

Couple *pcouple1 = new Couple(mary, *pjohn);
Couple couple2(*pjane, mark);

上班？我在情侣（玛丽和情侣2）之间得到一个红色的波浪线（* pjane与以下信息：

*错误C2664：＆＃39;情侣::情侣（常见情侣＆amp;）＆＃39; ：不能转换来自＆＃39; Person＆＃39; to＆＃39; const char *＆＃39;

*智能感知：没有构造函数的实例＆＃34;情侣::情侣＆＃34;匹配参数列表    参数类型是:(人，人）

代码是：

Class Couple＆amp;人

class Person {
char* name;    

public:

friend class Couple;

friend ostream& operator<<(ostream& str, const Person& os)
{
    str << os.name;
    return str;
};

Person(const char* n)
{
    name = (char*)n;
    cout << "char constructor   " << name << endl;
};

Person(const Person& os)
{
    name = os.name;
    cout << "Person constructor " << name << endl;
};

Person& operator=(const Person& os)
{
    this->name = os.name;
    return *this;   
};

~Person()
{
    free(name);          
    cout << "Class Person Destructor" << endl;
};

char* getName(){
    return name;
    };

};

class Couple {

Person *wife, *husband;

public:

friend ostream& operator<<(ostream& str, const Couple& p)
{
    str << "He " << *p.husband << " She " << *p.wife;
};

Couple::Couple(const char* m, const char* z)
{
    husband = new Person(m);
    wife = new Person(z);
    cout << "Couple1: " << endl;
};

Couple::Couple(const Couple& other)
{
    husband = new Person(*other.husband);
    wife = new Person(*other.wife);
    cout << "Couple2: " << endl;
}

Couple& operator=(const Couple& other)
{
    this->husband = new Person(*other.husband);
    this->wife = new Person(*other.wife);
    return *this;
};


~Couple()
{
    free(husband->name);
    free(husband);
    free(wife->name);
    free(wife);
    cout << "Class Couple Destructor" << endl;
};

};

主要功能：

int main(void) {

Person *pjohn = new Person("John"),
       *pjane = new Person("Jane");

Person mary("Mary"), mark("Mark");

Couple *pcouple1 = new Couple(mary, *pjohn);
Couple couple2(*pjane, mark);
    delete pjohn;
    delete pjane;

    cout << *pcouple1 << endl;
    cout << couple2 << endl;

    couple2 = *pcouple1;
    delete pcouple1;
    cout << couple2 << endl;


return 0;

}

有人可以向我推荐一个好的来源/网站/书籍/练习来理解类似于这个练习的更好的功能指针，在此之前我还在学习。

Answer 1

显然，您的Couple构造函数需要两个char*参数，但您正在尝试使用两个Couple对象构造Person对象。引入构造函数，接受Person作为参数，或将给定的Person实例转换为char*。

函数指针，错误无法将参数1转换为const char

1 个答案: