//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Assignment2_c.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
    : TForm(Owner)
{
    double no1,no2;
    AnsiString oprator;

    no1=num1->Text.ToDouble();
    no2=num2->Text.ToDouble();
    oprator=oprtor->Text;


    if (oprator=='+') {

    this->result->Caption=AnsiString(no1+no2);

    }

    else if (oprator=='-') {
            this->result->Caption=AnsiString(no1-no2);
                                                        }

        else if (oprator=='/')
        {
           if (num2!=0) {
                this->result->Caption=AnsiString(no1/no2);
           }
           else
              {ShowMessage(" You have to put non-zero numbers");                                            }
                                      }

           }

실행시키니

Project Assignment2_p.exe raised exception class EConvertError with message "" is not a valid floating point value'

라는 알수없는 에러메시지가 뜨네요 ㅠㅠㅠㅠㅠㅠ   +, -, /   문자 쓰는거 저렇게 하면 되나요 ㅠ 잘못된 곳 좀 찾아주세요 3시간 넘게 끙끙대는데 안되요 ;