带参数的构造函数

#include <iostream>

class Box

{

public:

Box(int ,int ,int);//声明带参数的构造函数
int volume();
private:
int height;
int width;
int length;
};


Box::Box(int h,int w,int len)       //在类外定义带参数的构造函数
{
height=h;
width=w;
length=len;


}


int Box::volume()
{
return (height*width*length);
}


int main()
{


Box box1(12,25,30);
cout<<"The volume of boxl is "<<box1.volume()<<endl;

Box box2(15,30,21);
cout<<"The volume of boxl is "<<box2.volume()<<endl;
return 0;
}