c++中多重继承应用

题目：

封装一个学生类（Student）：包括受保护成员：姓名、年龄、分数，完成其相关函数，以及show

在封装一个领导类（Leader）:包括受保护成员：岗位、工资，完成其相关函数及show

由以上两个类共同把派生出学生干部类：引入私有成员：管辖人数，完成其相关函数以及show函数

在主程序中，测试学生干部类：无参构造、有参构造、拷贝构造、拷贝赋值、show

程序：

#include <iostream>

using namespace std;

class Student
{
protected:
    string name;
    int age;
    double score;
    
public:
    Student(){cout<<"Stu::无参构造"<<endl;}
    Student(string n,int a,double s):name(n),age(a),score(s)
    {
        cout <<"Stu::有参构造"<<endl;
    }
    //析构函数
     ~Student(){cout<<"Student::析构函数"<<endl;}
    //拷贝构造函数
    Student(const Student&other):name(other.name),age(other.age),score(other.score)
    {
        cout<<"Student::拷贝构造函数"<<endl;
    }

    //父类的拷贝赋值函数
    Student &operator=(const Student&other)
    {
        if(this != &other)
        {
            this->name = other.name;
            this->age = other.age;
            this->score = other.score;
        }
        cout<<"Student::拷贝赋值函数"<<endl;
        return *this;
    }
    void show()
    {
        cout<<"stu.name:"<<name<<endl;
        cout<<"stu.age:"<<age<<endl;
        cout<<"stu.score:"<<score<<endl;
    }
};

class Leader
{

protected:
    string position;
    int wage;

public:
    Leader(){cout<<"Leader::无参构造"<<endl;}
    Leader(string p,int w):position(p),wage(w)
    {
        cout <<"Leader::有参构造"<<endl;
    }
    //析构函数
     ~Leader(){cout<<"Leader::析构函数"<<endl;}
    //拷贝构造函数
    Leader(const Leader&other):position(other.position),wage(other.wage)
    {
        cout<<"Leader::拷贝构造函数"<<endl;
    }


    //父类的拷贝赋值函数
    Leader &operator=(const Leader&other)
    {
        if(this != &other)
        {
            this->position= other.position;
            this->wage= other.wage;

        }
        cout<<"Student::拷贝赋值函数"<<endl;
        return *this;
    }
    void show()
    {
        cout<<"Leader.name:"<<position<<endl;
        cout<<"Leader.age:"<<wage<<endl;

    }
};

class cadre:public Student,public Leader
{
private:
    int num;
public:
    cadre(){cout<<"cadre::无参构造"<<endl;}
    cadre(string n,int a,double s,string p,int w,int n1):Student(n,a,s),Leader(p,w),num(n1)
    {
        cout <<"cadre::有参构造"<<endl;
    }
    //子类析构函数
        ~cadre(){
            cout<<"cadre::析构函数"<<endl;
        }


    //子类拷贝构造函数
    cadre (const cadre&other):Student(other),Leader(other),num(other.num)
    {
        cout<<"cadre::拷贝构造"<<endl;
    }

    //子类的拷贝赋值函数
    cadre &operator=(const cadre&other)
    {
        if(this != &other)
        {
            this->num = other.num;

            Student::operator=(other);  //调用父类的拷贝赋值函数，完成对继承下来成员的赋值
            Leader::operator=(other);
        }
        cout<<"cadre::拷贝赋值函数"<<endl;
        return  *this;
    }
    void show()
    {
         cout<<"cadre::name = "<<this->name<<endl;
         cout<<"cadre::age = "<<age<<endl;
         cout<<"cadre::score = "<<score<<endl;
         cout<<"cadre::position = "<<position<<endl;
         cout<<"cadre::wage = "<<wage<<endl;
         cout<<"cadre::num = "<<num<<endl;
    }

};

int main()
{
    //无参构造
    cadre c1;
    cout<<"***************************"<<endl;
    //有参构造
    cadre c2("wxy",20,99,"团支书",100,30);
    c2.show();
    cout<<"***************************"<<endl;
    //拷贝构造
    cadre c3=c2;
    c3.show();
    cout<<"***************************"<<endl;
    //拷贝赋值
    cadre c4;
    c4=c2;
    c4.show();
    return 0;
}

运行效果：