Перегрузка operator+

MyClass MyClass::operator + (const MyClass &c)
{
col=2;....

//---------------------------------------------------------------------------
 
#ifndef Unit2H
#define Unit2H
//---------------------------------------------------------------------------
#endif
  class MyClass
{ private:
double *vec; 
int rows, col; 
public:
MyClass (int gridCol, int fill); 
~MyClass ();
MyClass operator + (const MyClass &c) ;  
   double& operator () (int i);
    MyClass& operator = (const MyClass& c);
    MyClass (const MyClass& c);
};

//---------------------------------------------------------------------------
#pragma hdrstop
#include "Unit1.h"
#include "Unit2.h"
#include <vcl/dstring.h>
#include <Math.hpp>
#include <math.h>
#include <Dialogs.hpp>
//---------------------------------------------------------------------------
 
#pragma package(smart_init)
MyClass::MyClass(int gridCol, int fill)
{
col = gridCol;
  int r = StrToInt(Form1->Edit1->Text);
  rows = r;
  vec = new double [rows];
  if (fill == 1)MyFill();
  else if (fill == -1) MyGridToVector();
  ShowMessage("конструктор MyClass Vector " + IntToStr(gridCol));
}
MyClass::MyClass (const MyClass& c)
{
 col=c.col;
 ShowMessage("конструктор MyClass Vector " + IntToStr(col));
 rows = c.rows;
 vec = new double [rows];
 for (int i=0; i<rows; ++i) vec [i] = c.vec [i];
}
 
MyClass::~MyClass()
{
  ShowMessage("äåñòðóêòîð êëàññà MyClass Vector " + IntToStr(col));
  delete [] vec;
}
MyClass MyClass::operator + (const MyClass &c)
{
col=2;
if(rows != c.rows) throw 1;
for (int i=0; i<rows; ++i)
vec [i] =pow(vec [i]+c.vec [i],2);
return *this; }
 
 
double& MyClass::operator () (int i)
{if(i<=rows)  return vec[i];
 else
 throw 1;
 }
 
MyClass& MyClass:: operator = (const MyClass& c)
 
{ if (this == &c) return *this;
if(rows != c.rows) throw 2;
for (int i=0; i<rows; ++i)
{
(*this) (i) = c.vec [i];
}
return *this;
}

MyClass MyClass::operator + (const MyClass &c) const
{
MyClass r(*this);
col=2;
if(r.rows != c.rows) throw 1;
for (int i=0; i<r.rows; ++i)
r.vec [i] =pow(r.vec [i]+c.vec [i],2);
return r; }

MyClass MyClass::operator + (const MyClass &c)
{
    MyClass r(*this);
    r += c;
    return r;
}