Out-of-line definition of 'ShowRecord' does not match any declaration in 'TForm1'

#include <vcl.h>
#include <tchar.h>
#include <vector>
#include <algorithm>
#include <functional>
 
using namespace std;
 
struct beer{
public:
    char name[50];
    int volume;
    int price;
 
void __fastcall ShowRecord();
 
friend bool operator<(const beer& a,const beer& b)
    { return a.price<b.price; }
 
friend bool operator==(const beer& a,const beer& b)
 
    { return a.price==b.price; }
 
};
 
extern vector <beer> drink;
 
extern int iMax,iCur;

//---------------------------------------------------------------------------
 
#include <vcl.h>
#pragma hdrstop
 
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
vector <beer> drink;
 
int iMax=0,iCur=0;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::ButtonAddClick(TObject *Sender)
{
drink.push_back(beer());
 
strcpy(drink[iMax].name,((AnsiString)EditName->Text).c_str());
 
drink[iMax].volume = EditVolume->Text.ToIntDef(0);
 
drink[iMax].price = EditPrice->Text.ToIntDef(0);
 
iCur = iMax; iMax++;
 
LabelNum->Caption = IntToStr(iMax) ;
}
//---------------------------------------------------------------------------
 void __fastcall TForm1::ShowRecord()
{
 
EditName->Text=drink[iCur].name;
 
EditVolume->Text=IntToStr(drink[iCur].volume);
 
EditPrice->Text=IntToStr(drink[iCur].price);
 
LabelNum->Caption=IntToStr(iCur+1);
 
}
void __fastcall TForm1::ButtonPrevClick(TObject *Sender)
{
if(iCur<=0) return;
 
iCur--; ShowRecord();
}
//---------------------------------------------------------------------------
void __fastcall TForm1::ButtonNextClick(TObject *Sender)
{
if(iCur>=iMax-1) return;
 
iCur++; ShowRecord();
}
//----

void __fastcall beer::ShowRecord()