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class TCar
{
   private:
   ...

   TCanvas* Canvas; //auch nicht....
   ...


   public:
   TCar(double x,double y, TCanvas* Canvas); //mag er nicht....
   
   ...

   void Draw(TCanvas* Canvas); // da meint er zu mir, [C++ Error] TCar.cpp(39): E2316 'TCar::Draw(TCanvas *)' is not a member of 'TCar'

};


in der cpp:

void TCar::Draw(TCanvas* Canvas){

  Canvas->Brush->Color = clBlack;

  for(int i= 0;i<4;i++){
  Canvas->Ellipse(_Tires[i].x - _TireSize,
                        _Tires[i].y - _TireSize,
                        _Tires[i].x + _TireSize,
                        _Tires[i].y + _TireSize);
  Canvas->MoveTo(_CarPoint.x,_CarPoint.y);
  Canvas->LineTo(_Tires[i].x,_Tires[i].y);
  }
  Canvas->Ellipse(_CarPoint.x - _TireSize,
                          _CarPoint.y - _TireSize,
                          _CarPoint.x + _TireSize,
                          _CarPoint.y + _TireSize);

}