hierarchy of shapes

[angelorohit]

can any one tell me if i did the volume for the tetrahedron right because i get a volume of zero.

Here

class Tetrahedron : public ThreeDimensionalShape{
public:
	Tetrahedron(double iside){
		side = iside;
	}
	virtual ~Tetrahedron(){}
	virtual double GetArea(){return (side * side) * sqrt(3.0);}
	virtual double GetVolume(){return (1.0f/12)*(side *side*side)*sqrt(2.0);}
private:
	double side;
};

It's just a type issue. Your answer is 0.94 but since 1/12 is treated as an integer operation, you end up getting zero.

[jlou]

Since we're using doubles I think I would go ahead and use a double there instead of a float

virtual double GetVolume(){return (1.0/12)*(side *side*side)*sqrt(2.0);}

[angelorohit]

Since we're using doubles I think I would go ahead and use a double there instead of a float

virtual double GetVolume(){return (1.0/12)*(side *side*side)*sqrt(2.0);}

Heh..heh. Yes, it should be double instead of float.