c9-6.cpp

这我们老师对是面向对象程序设计（清华大学出版社）一书制作的PPT

#include <iostream>
using namespace std;

class Box
 {public:
   Box(int h=10,int w=12,int len=15):height(h),width(w),length(len){ }
   int volume();
  private:
   int height;
   int width;
   int length;
 };

int Box::volume()
 {return(height*width*length);
 }
    
int main()
 {
  Box a[3]={
   Box(10,12,15),
   Box(15,18,20),
   Box(16,20,26)
   };
  cout<<"volume of a[0] is "<<a[0].volume()<<endl;
  cout<<"volume of a[0] is "<<a[1].volume()<<endl;
  cout<<"volume of a[0] is "<<a[2].volume()<<endl;
  return 0;
 }