gui-sample1/Unit1.cpp

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

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
	: TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
	int upper;
	int i;
	long long sum=0;

	upper = StrToInt(Edit1->Text);

	for( i= 1 ; i <= upper ; i++ )
		sum += i;
    Label3->Caption = IntToStr(sum);

}
//---------------------------------------------------------------------------