1.h

这个因为是我们老师让做的阶乘的代码

class shape
{
public:
	
	void input(){}
	void getarea(){}
protected:
    double s;
};
class rectangle:public shape
{
public:
    int a,b;
	void input(){cout<<"请输入长和宽："<<endl;cin>>a>>b;}
	void getarea(){s=a*b;cout<<s<<endl;}

};
class circle:public shape
{
public:
	int r;
	void input(){cout<<"请输入半径："<<endl;cin>>r;}
	void getarea(){s=3.14*r*r;cout<<s<<endl;}
};