实验6 类的继承和多态

//6-1
#include <iostream>
using namespace std;
class A{
    public:
        A(int a,int b):m(a),n(b){}
        int add(){
            cout<<"m+n= "<<m+n<<endl;
        }
    private:
        int m,n; 
};
class B:public A{
    public:
        B(int a,int b):A(a,b){
            m=a;
            n=b;
        }
        int minus(){
            cout<<"m-n= "<<m-n<<endl;
        }
    private:
        int m,n;
};
class C:public A{
    public:
        C(int a,int b):A(a,b){
            m=a;
            n=b;
        }
        int multiply(){
            cout<<"m*n= "<<m*n<<endl;
        }
    private:
        int m,n;
}; 
class D:public A{
    public:
        D(int a,int b):A(a,b){
            m=a;
            n=b;
        }
        int division(){
            cout<<"m/n= "<<m/n<<endl;
        }
    private:
        int m,n;
};
int main(){
    B b(30,15);
    b.add();
    b.minus();
    C c(30,2);
    c.add();
    c.multiply();
    D d(30,3);
    d.add();
    d.division();
    return 0;
}

//6-2
#include <iostream>
using namespace std;
class vehicle{
    public:
        vehicle(int m,int w):maxspeed(m),weight(w){
            cout<<"maxspeed= "<<maxspeed<<endl;
            cout<<"weight= "<<weight<<endl;
        }
        ~vehicle(){}
        void run(){
            cout<<"run"<<endl;
        }
        void stop(){
            cout<<"stop"<<endl;
        }
    private:
        int maxspeed,weight;
}; 
class bicycle:virtual public vehicle{
    public:
        bicycle(int m,int w,int h):vehicle(m,w){
            height=h;
            cout<<"height is:"<<height<<endl;
        }
        ~bicycle(){}
    private:
        int height;
};
class motorcar:virtual public vehicle{
    public:
        motorcar(int m,int w,int s):vehicle(m,w){
            seatnum=s;
            cout<<"seatnum is "<<seatnum<<endl;
        }
        ~motorcar(){}
    private:
        int seatnum;
};
class motorcycle:public bicycle,public motorcar{
    public:
        motorcycle(int m,int w,int h,int s):vehicle(m,w),motorcar(m,w,s),bicycle(m,w,h){}
        ~motorcycle(){}
};
int main(){
    vehicle v(150,100);
    v.run();
    v.stop();
    motorcar a(100,75,2);
    a.run();
    a.stop();
    bicycle b(50,30,1);
    b.run();
    b.stop();
    motorcycle c(100,50,1,2);
    c.run();
    c.stop();
    return 0;
}