Błędy kompilacji w obiektowym C++

Question

Mam taki fragment kodu:

 

FiguraPlaska.h

#include <iostream>
class FiguraPlaska
{
protected:
	virtual void Wypisz(std::ostream& out) const = 0;
	friend std::ostream& operator<<(std::ostream& os, const FiguraPlaska&
		figura);
public:
	virtual double Pole() = 0;
	virtual double Obwod() = 0;
	virtual ~FiguraPlaska();
};

 

FiguraPlaska.cpp

#include "FiguraPlaska.h"
std::ostream& operator<<(std::ostream& os, const FiguraPlaska& figura)
{
	figura.Wypisz(os);
	return os;
}
FiguraPlaska::~FiguraPlaska()
{
}

 

Prostakat.h

#include "FiguraPlaska.h"
class Prostokat : public FiguraPlaska
{
private:
	double a, b;
protected:
	void Wypisz(std::ostream& out) const override;
public:
	Prostokat(double a, double b);
	double GetA() const;
	void SetA(double a);
	double GetB() const;
	void SetB(double b);
	double Obwod() override;
	double Pole() override;

	~Prostokat() override;
};

 

Prostakat.cpp

#include "Prostokat.h"
#include <iostream>
using namespace std;
Prostokat::Prostokat(double a, double b) : a(a), b(b)
{
	cout << "Konstruktor Prostokąta(" << a << "," << b << ")" << endl;
}
double Prostokat::GetA() const
{
	return a;
}
double Prostokat::GetB() const
{
	return b;
}
void Prostokat::SetA(double a)
{
	this->a = a;
}
void Prostokat::SetB(double b)
{
	this->b = b;
}
double Prostokat::Obwod()
{
	return 2 * a + 2 * b;
}
double Prostokat::Pole()
{
	return a * b;
}
void Prostokat::Wypisz(std::ostream& out) const
{
	cout << "Prostokat o bokach a=" << a << " i b=" << b << endl;
}

Prostokat::~Prostokat()
{
	//todo
}

 

main.cpp:

#include <iostream>
#include "Prostokat.h"

int main()
{
    Prostokat myProstakat(4, 7);

    std::cout << "Hello World!\n";
}

 

Przy próbie kompilacji pojawia się błąd:

'FiguraPlaska': 'class' type redefinition
'FiguraPlaska': base class undefined
'Prostokat::Wypisz': method with override specifier 'override' did not override any base class methods
'Prostokat::Obwod': method with override specifier 'override' did not override any base class methods
'Prostokat::Pole': method with override specifier 'override' did not override any base class methods
'Prostokat::~Prostokat': method with override specifier 'override' did not override any base class methods

 

Dlaczego powyższe błędy się pojawiają?

Comments

Na oko... gdzieś zgubiłeś include guardy/pragma once? :)

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Dodałem na początku FiguraPlaska.h i działa, dzieki.

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(każdy plik .h powinien mieć include guardy)