c9-4-2.cpp

谭浩强C程序设计习题答案

#include <iostream>
using namespace std;
class Box
 {public:
   Box(int=10,int=10,int=10);
   int volume();
  private:
   int height;
   int width;
   int length;
 };
 
Box::Box(int h,int w,int len):height(h),width(w),length(len)
{ }

int Box::volume()
 {return(height*width*length);
 }
 
    
int main()
 {
  Box box1;
  cout<<"The volume of box1 is "<<box1.volume()<<endl;
  Box box2(15);
  cout<<"The volume of box2 is "<<box2.volume()<<endl;
  Box box3(15,30);
  cout<<"The volume of box3 is "<<box3.volume()<<endl;
  Box box4(15,30,20);
  cout<<"The volume of box4 is "<<box4.volume()<<endl;
  return 0;
 }