c++ day2

#include <iostream>

using namespace std;
class rectangle{
    int length;
    int width;
public:
    void set_l(){
        cin>>length;
    }
    void set_w(){
        cin>>width;
    }
    int get_l(){
        return length;
    }
    int get_w(){
        return width;
    }
    void show(){
        int peremeter=2*(length+width);
        int space=length*width;
        cout<<"周长= "<<peremeter<<"  面积="<<space<<endl;
    }
};

int main()
{
    rectangle r1;
    r1.set_l();
    r1.set_w();
    cout<<r1.get_l()<<"   "<<r1.get_w()<<endl;
    r1.show();

    return 0;
}

 结果

3
5
3   5
周长= 16  面积=15