第三周實驗報告（四)

#include<iostream>
using namespace std;
class Box
{

public:

void get_value();
void display();
float volume();
float area();

private:

float length;
float width;
float height;

};
void Box::get_value()
{
cout<<"please input length,width,height:";

cin>>length;

cin>>width;
cin>>height;
}
float Box::volume()
{
return(length*width*height);
}
float Box::area()
{
cout<<2*(width*height+length*width+length*height)<<endl;
return 0;
}

void Box::display()
{
cout<<volume()<<endl;
}
int main()
{
Box box1,box2,box3;
box1.get_value();
cout<<"volmue of box1 is ";
box1.display();
cout<<"area of box1 is ";
box1.area();
box2.get_value();
cout<<"volme of box2 is ";
box2.display();
cout<<"area of box2 is ";
box2.area();
box3.get_value();
cout<<"volme of box3 is ";
box3.display();
cout<<"area of box3 is ";
box3.area();
return 0;
}