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Problem with virtual function...

fyodor (11)
Hello! =) I have one more problem =/ I must run program like that:
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Vector2D V2D;
Vector3D V3D;
cin>>V3D;
cout<<V3D;
Vector2D *pV2D = &V3D;
cout<<(pV2D->GetLength());

getch();


but when i'm compiling one error appears:
'GetLength' : is not a member of 'Vector2D'

but IS a member...

that's code of my program:
cpp:
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#include <iostream>
#include "Przyklad.h"

using namespace std;

Vector2D::Vector2D():x(3), y(2)
{}

double Vector2D::GetLenght()
{
	double lenght=sqrt(x*x+y*y);
	return lenght;
}
void Vector2D::Get(istream& in)
{
	cout<<endl<<"Podaj wspolrzedna X: ";
	in>>x;
	cout<<"Podaj wspolrzedna Y: ";
	in>>y;
}

void Vector2D::Put(ostream& out)
{
	out<<"Wspolrzedna X tego wektora to: "<<x<<endl;
	out<<"Wspolrzedna Y tego wektora to: "<<y<<endl;
}
ostream& operator<<(ostream& out, Vector2D& vector)
{
	vector.Put(out);
	return out;
}
istream& operator>>(istream& in, Vector2D& vector)
{
  vector.Get(in);
  return in;
}
Vector2D::~Vector2D()
{}

double Vector3D::GetLength()
{
	double lenght=sqrt(x*x+y*y+z*z);
	return lenght;
}
void Vector3D::Put(ostream& out)
{
	out<<"Wspolrzedna X tego wektora to: "<<x<<endl;
	out<<"Wspolrzedna Y tego wektora to: "<<y<<endl;
	out<<"Wspolrzedna Z tego wektora to: "<<z<<endl;
}
void Vector3D::Get(istream& in)
{
	cout<<"Podaj wspolrzedna X: ";
	in>>x;
	cout<<"Podaj wspolrzedna Y: ";
	in>>y;
	cout<<"Podaj wspolrzedna Z: ";
	in>>z;
}


header:
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#include <iostream>
#include <string>

using namespace std;

class Vector2D
{
	protected:
		double x, y;
	public:
		Vector2D();
		virtual double GetLenght();
		virtual void Get(istream& in);
		virtual void Put(ostream& out);
		friend ostream& operator<<(ostream& out, Vector2D& vector);
		friend istream& operator>>(istream& in, Vector2D& vector);
		~Vector2D();
};

class Vector3D : public Vector2D
{
	protected:
	double z;
	public:
	double GetLength();
	void Put(ostream& out);
	void Get(istream& in);
};


can someone tell me what should i do to compile this prog??


p.s. sorry for my english...
Last edited on
Bazzy (6281)
Vector2D has a member called GetLenght, not one called GetLength
fyodor (11)
HAhaha...how stupid i'm:D thank you...
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