构造函数的重载

#include<iostream>
using namespace std;
class Box
{
public:
	Box();
	Box(int h,int w,int len):height(h),width(w),length(len) {}
	int  volume();
private:
	int height;
	int width;
	int length;
};
Box::Box()
{
	height=10;
	width=10;
	length=10;
}
int  Box::volume()
{
	return(height*width*length);
}
int main()
{
	Box Box1,Box2(15,30,25);
	cout<<"The volume of the box1 is"<<Box1.volume()<<endl;
    cout<<"The volume of the box2 is"<<Box2.volume()<<endl;
	return 0;
}