C++中的特殊成员函数

1思维导图

#include <iostream>using namespace std;//设计一个per类
class Per
{
private:string name;int age;double *weight;double *high;
public://无参构造函数Per(){weight = nullptr;high = nullptr;cout << "Per:: 无参构造函数" << endl;}//有参构造函数Per(string name,int age,double weight,double high):name(name),age(age),weight(new double(weight)),high(new double(high)){cout << "Per::有参构造函数" << endl;}//拷贝构造函数Per(const Per &other):name(other.name),age(other.age),weight(new double(*other.weight)),high(new double(*other.high)){cout << "拷贝构造函数" << endl;}//拷贝赋值函数Per& operator=(const Per &other){if(this!=&other){name = other.name;age = other.age;weight = new double(*other.weight);high = new double(*other.high);}cout << "Per::拷贝赋值函数" << endl;return *this;}//析构函数~Per(){delete weight;delete high;weight = nullptr;high = nullptr;cout << "Per::析构函数" << endl;}void show(){cout << "name = " << name << endl;cout << "age = " << age << endl;cout << "high = " << *high << endl;cout << "weight = " << *weight << endl;}
};//Stu类
class Stu
{
private:double score;Per p1;
public:Stu(){cout << "Stu::无参构造函数" << endl;}Stu(double score,string name ,int age,double wight,double high):score(score),p1(name,age,wight,high){cout << "Stu::有参构造函数" << endl;}Stu& operator=(const Stu &other){if(this!=&other){score = other.score;p1 = other.p1;}cout << "Stu::拷贝赋值函数" << endl;return *this;}Stu(const Stu &other):score(other.score),p1(other.p1){cout << "Stu::拷贝构造函数" << endl;}~Stu(){cout << "Stu::析构函数" << endl;}void show(){p1.show();cout << "Stu::score = " << score << endl;}
};int main()
{Stu s1;Stu s2(99,"张三",18,200,160);s1 =s2;s1.show();Stu s3 = s1;return 0;
}