学步园

#include<iostream>
#include<string>
#include<cstdlib>
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(10,12,13), Box(15,18,20), Box(16,20,26)};
 cout<<"volume of a[0] is "<<a[0].volume()<<endl;
 cout<<"volume of a[1] is "<<a[1].volume()<<endl;
 cout<<"volume of a[2] is "<<a[2].volume()<<endl;
 system("pause");
 return 0;
}