题解 | #多态实现求面积体积#

#include<bits/stdc++.h>
using namespace std;
class rectangle{
    private:
        int length,width;
    public:
        rectangle(int x,int y){
            length=x;
            width=y;
        }
        void set(int x,int y){
            length=x;
            width=y;
        }
        int getlength(){
            return length;
        }
        int getwidth(){
            return width;
        }
        // write your code here...
        virtual int getval(){
            return length*width;
        } 
};
class cuboid:public rectangle{
    private:
        int height;
    public:
        cuboid(int x,int y,int z):rectangle(x,y){
            height=z;
        }
        // write your code here...
        int getval(){
            return getlength()*getwidth()*height;
        }
};
int main(){
    int x,y,z;
    cin>>x>>y>>z;
    cuboid a(x,y,z);
    rectangle b(x,y);

    rectangle *p=&b;
    cout<<p->getval()<<'\n';

    p=&a;
    cout<<p->getval();
    return 0;
}