题解 | KiKi设计类继承

#include <cstdio>
#include <iostream>
#include <limits>
using namespace std;

class shape
{
    private:
    int x = 0;
    int y = 0;
    
};

class Rectangle:public shape
{
    public: 
    int length;
    int wide;
    void GetArea(int s,int t);

};
void Rectangle::GetArea(int s, int t)
{
   cout<<s*t<<endl ;
}

class Circle:public shape
{
    public:
    int r;
    void GetArea(int r);
    
};
void Circle::GetArea(int r)
{
    cout<<3.14*r*r<<endl;
}
class Square : public Rectangle {
public:
    // 重写 GetArea，只需要一个参数
    void GetArea(int s) {
        cout<< s * s;
    }
};


int main() 
{
    int a,b,c,d;
    Rectangle s1;
    Circle    s3;
    Square    s2;
    cin>>a>>b;
    s1.GetArea(a, b);

    cin>>c;
    s3.GetArea(c);

    cin>>d;
    s2.GetArea(d);

}