Ошибка при вызове метода класса-наследника

//---------------------------------------------------------------------------
 
#include <vcl.h>
#pragma hdrstop
 
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
 
 
class operators
{
        protected:
        String name; int min; float s;
        public:
        operators(String iname,int imin, float is):name(iname), min(imin), s(is){}
        float rachest(){return 100*s/min;};
        String inform(){String s= name+" "+"Q="+FloatToStr(rachest()); return s;};
};
class operators2: public operators
{
        private:
        int d;
        public:
        operators2(String tname,int tmin, float ts, int td):operators(name,min,s),d(td){}
        float rachest2(){float q =operators::rachest(); if(d){return 0.7*q;}else{return 1.5*q;}};
        String inform2(){String s= name+" "+"Q="+FloatToStr(rachest2()); return s;};
};
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
 
void __fastcall TForm1::Button1Click(TObject *Sender)
{
String name=Edit1->Text;
int min=StrToInt(Edit2->Text);
float s=StrToFloat(Edit3->Text);
operators one(name,min,s);
Memo1->Lines->Add(one.inform());
 
int d;
if(CheckBox1->Checked==true){
 d = true;
}else d = false;
 
operators2 two(name,min,s,d);
Memo1->Lines->Add("èçìåðåíîå êà÷åñòâî "+ two.inform2());
 
 
 
 
 
 
 
/*
 
 
p0= new operators(name,min,s);
Memo1->Lines->Add(p0->inform());
int p;
if(CheckBox1->Checked==true){
 p = true;
}else p = false;
 
p1= new  operators2 (name,min,s,p);
Memo1->Lines->Add("èçìåðåíîå êà÷åñòâî "+ p1->inform());
 
*/
 
Edit1->Clear();
Edit2->Clear();
Edit3->Clear();
 
     
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{
Edit1->Clear();
Edit2->Clear();
Edit3->Clear();
 
Memo1->Clear();
}
//---------------------------------------------------------------------------
 
void __fastcall TForm1::Button3Click(TObject *Sender)
{
Close();        
}
//---------------------------------------------------------------------------

operators2(String tname,int tmin, float ts, int td):operators(tname,tmin,ts),d(td){}