C++基础知识梳理--C++的6个默认函数

Person.h

#ifndef PERSON_H
#define PERSON_H
#include <iostream>
#include <string>

using namespace std;

class Person
{
public:
    Person();   // deafault构造函数;
    Person(const Person&);  // 默认拷贝构造函数
    ~Person();  // 析构函数
    Person& operator = (const Person &);    // 赋值运算符
    Person *operator &(); // 取值运算符
    const Person *operator &() const; // 取值运算符const

public:
    string getName() { return sName; }
    string getCode() { return sCode; }

    void setName(string name);
    void setCode(string code);

    void printInfo();
private:
    string sName;
    string sCode;
};

#endif // PERSON_H

Person.cpp

#include "Person.h"

Person::Person()
{
    cout << "运行：default构造函数；" << endl;
}

Person::Person(const Person &src)
{
    cout << "运行：copy构造函数；" << endl;
    sName = src.sName;
    sCode = src.sCode;
}

Person::~Person()
{
    cout << "运行：析构函数；" << endl;
}

Person &Person::operator =(const Person &src)
{
    cout << "运行：赋值运算符；" << endl;
    sName = src.sName;
    sCode = src.sCode;
    return *this;
}

Person *Person::operator &()
{
    cout << "运行：取址运算符；" << endl;
    return this;
}

const Person *Person::operator &() const
{
    cout << "运行：取址运算符const；" << endl;
    return this;
}

void Person::setName(string name)
{
    sName = name;
}

void Person::setCode(string code)
{
    sCode = code;
}

void Person::printInfo()
{
    cout << "Name : " << sName << endl;
    cout << "Code : " << sCode << endl << endl;
}

main.cpp

#include <iostream>

#include "Person.h"

using namespace std;

int main()
{
    // 创建a
    Person a;
    a.setName("李明");
    a.setCode("0101");

    // 创建b
    Person b(a);
    b.setCode("0102");

    // 创建c
    Person c;
    c = b;
    c.setCode("0103");

    // 创建d
    Person *d;
    d = &a;
    d->setCode("0104");

    // 输出
    a.printInfo();
    b.printInfo();
    c.printInfo();
    d->printInfo();
    return 0;
}