Simple calculator program in Delphi

Here is a simple calculator program I made in Delphi. There is also an IF THEN ELSE statement if the user is trying to divide by zero so that we do not encounter a run-time error.

The activity is based on an activity from the “Delphi for CAPS Part 1” textbook by Marina Myburgh.

Code excerpt

procedure TForm1.btnClearClick(Sender: TObject);
begin
edtX.Text := IntToStr(0);
edtY.Text := IntToStr(0);
lblAnswer.Caption := '...';
end;
procedure TForm1.btnDivideClick(Sender: TObject);
var ianswer : real;
begin
ix := StrToInt(edtX.Text);
iy := StrToInt(edtY.Text);
if (iy=0) then
ShowMessage('I cannot divide by zero')
else
begin
ianswer := ix/iy;
lblAnswer.Caption := IntToStr(ix) + ' / ' + IntToStr(iy) + ' = ' +FloatToStrf(ianswer,ffFixed,4,2);
end;
end;
procedure TForm1.btnMinusClick(Sender: TObject);
begin
ix := StrToInt(edtX.Text);
iy := StrToInt(edtY.Text);
ianswer := ix-iy;
lblAnswer.Caption := IntToStr(ix) + ' - ' + IntToStr(iy) + ' = ' + IntToStr(ianswer);
end;
procedure TForm1.btnMultiplyClick(Sender: TObject);
begin
ix := StrToInt(edtX.Text);
iy := StrToInt(edtY.Text);
ianswer := ix*iy;
lblAnswer.Caption := IntToStr(ix) + ' X ' + IntToStr(iy) + ' = ' + IntToStr(ianswer);
end;
procedure TForm1.btnPlusClick(Sender: TObject);
begin
ix := StrToInt(edtX.Text);
iy := StrToInt(edtY.Text);
ianswer := ix+iy;
lblAnswer.Caption := IntToStr(ix) + ' + ' + IntToStr(iy) + ' = ' + IntToStr(ianswer);
end;

Members can download the project files below

Download the project files here