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最新推荐文章于 2025-12-21 18:32:56 发布

原创最新推荐文章于 2025-12-21 18:32:56 发布 · 610 阅读

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#c++ #开发语言

本文详细介绍了C++中Person和Stu类的构造函数（包括有参构造和拷贝构造）、析构函数以及Stu类的show方法。展示了如何使用指针和参数传递创建对象实例。

#include <iostream>

using namespace std;

class Person
{
    int *age;
    string &name;
public:
//    Person()
//    {

//    }
    Person(int a,string &b):age(new int(a)),name(b)
    {
        cout << "Person的有参构造" << endl;
    }
    Person(const Person &other):age(new int(*(other.age))),name(other.name)
    {
        cout << "Person的拷贝构造函数" << endl;
    }
    ~Person()
    {
        delete age;
        cout << "Person的析构函数" << endl;
    }
};

class Stu
{
    double *score;
    Person p1;
public:
//    Stu():
//    {
//    }
    Stu(double score,int a,string b):score(new double(score)),p1(a,b)
    {
        cout << "Stu的有参构造" << endl;
    }
    ~Stu()
    {
        delete score;
        cout << "Stu的析构函数" << endl;
    }
    Stu(const Stu &other):score(new double (*(other.score))),p1(other.p1)
    {
        cout << "Stu的拷贝构造函数" << endl;
    }
//    Stu &operator=(const Stu& other)
//    {
//        this->score=other.score;
//        this->p1 = other.p1;
//    }
    void show();
};

void Stu::show()
{
    cout << "score= " << score << endl;
    cout << "*score= " << *score << endl;

//    cout << "age= " <<  age << endl;
//    cout << "*age= " << *age << endl;
//    cout << "name= " << name << endl;
}




int main()
{
    Stu stu(100.00,18,"zhangsan");
    stu.show();
    cout << "---------------------------------------" << endl;
    Stu stu1 = stu;
    stu1.show();
    cout << "---------------------------------------" << endl;
//    Stu stu2;
//    stu2 = stu;

    return 0;
}

效果图: