cpp第二次作业
现象：
源码：
#include <iostream>using namespace std;class Rectangle{
private:int length;int width;
public:void set_l(int l);void set_w(int w);int get_l();int get_w();void show();
};void Rectangle::set_l(int l)
{length=l;
}void Rectangle::set_w(int w)
{width=w;
}int Rectangle::get_l()
{return length;
}int Rectangle::get_w()
{return width;
}void Rectangle::show()
{cout << "矩形面积为："<<get_l()*get_w() << endl;
}int main()
{Rectangle data;int a,b;cout<<"请输入长和宽"<<endl;cin>>a>>b;data.set_l(a);data.set_w(b);data.show();return 0;
}