C++ day3

张智仁012024-03-14 13:31

1.思维导图

2.设计一个Per类，类中包含私有成员：姓名、年龄、指针成员身高、体重。再设计一个Stu类，类中包含私有成员：成绩、Per类对象p1，设计这两个类的构造函数、析构函数和拷贝构造函数。

复制代码

#include <iostream>

using namespace std;

class Per
{
private:
    string name;
    int age;
    double *height;
    double *weight;
public:
    //无参构造函数
    Per()
    {
        cout << "Per::无参构造函数" << endl;
    }
    //有参构造函数
    Per(string name,int age,double height,double weight):name(name),age(age),height(new double(height)),weight(new double(weight))
    {
        cout << "Per::有参构造函数" << endl;
    }

    //浅拷贝构造函数
//    Per(const Per &other):name(other.name),age(other.age),height(other.height),weight(other.weight)
//    {
//        cout << "Per::浅拷贝" << endl;
//    }
    //深拷贝构造函数
    Per(const Per &other):name(other.name),age(other.age),height(new double(*(other.height))),weight(new double(*(other.weight)))
    {
        cout << "Per::深拷贝" << endl;
    }
    //析构函数
    ~Per()
    {
        cout << "Per::析构函数" << endl;
    }

    void show()
    {
        cout << "姓名：" << name << "年龄：" << age << "身高：" << *(height) << "体重：" << *(weight) << endl;
    }
};

class Stu
{
private:
    int score;
    Per p1;
public:
    //无参构造函数
    Stu()
    {
        cout << "Stu::无参构造函数" << endl;
    }
    //有参构造函数
    Stu(int score,Per p1):score(score),p1(p1)
    {
        cout << "Stu::有参构造函数" << endl;
    }
    //析构函数
    ~Stu()
    {
        cout << "Stu::析构函数" << endl;
    }
    void show()
    {
        cout << "成绩：" << score << endl;
        p1.show();
    }
};
int main()
{
    Per r1();    //自动调用无参构造函数
    Per r2("张三",23,178,120);     //自动调用有参构造函数
    Per r3=r2;
    Stu s1;
    Stu s2(88,r2);
    s2.show();

    return 0;
}