第二章第6题

#include <iostream>using namespace std;class Box{public:  void get_value();  float volume();  void display(); public:  float lengh;  float width;  float height;  };void Box::get_value(){ cout<<"please input lengh, width,height:";  cin>>lengh;  cin>>width;  cin>>height;}float Box::volume(){ return(lengh*width*height);}void Box::display(){ cout<<volume()<<endl;}int main(){Box box1,box2,box3; box1.get_value(); cout<<"volmue of bax1 is "; box1.display(); box2.get_value(); cout<<"volmue of bax2 is "; box2.display(); box3.get_value(); cout<<"volmue of bax3 is "; box3.display(); return 0;}