定义c++对象（c++可以完成面向对象编程）(正方体的实例应用）；

#include

using namespace std;

class Box {
public:
double lenghth; //长
double breadth; //宽
double height; //高
};

int main() {
Box Box1; //声明Box1，类型为Box
Box Box2; //声明Box2，类型为Box
double volume = 0; //用于储存体积

//Box1的详述
Box1.lenghth = 5.0;
Box1.breadth = 6.0;
Box1.height = 7.0;

//Box2的详述
Box2.lenghth = 10.1;
Box2.breadth = 12.0;
Box2.height = 13.0;

//box1的体积
volume = Box1.lenghth*Box1.breadth*Box1.height;
cout << "box1(V) = " << volume << endl;	

//box2的体积
volume = Box2.lenghth*Box2.breadth*Box2.height;
cout << "box2(V) = " << volume << endl;

return 0;

}