FormatFloat (C++)

Description

The following example uses two buttons, a string grid, and text edit on a form. When the conversion button is clicked, the values across the top of the string grid are converted using the formats along the left side. Select a cell and use the Alter Cell button and text edit to change the values converted and the conversion formats.

Code

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  for (int x = 1; x < StringGrid1->ColCount; x++)
  {
        for (int y = 1; y < StringGrid1->RowCount; y++)
        {
          StringGrid1->Cells[x][y] = FormatFloat(
          StringGrid1->Cells[0][y], StrToFloat(StringGrid1->Cells[x][0]));
        }
  }
}
 
int currCellCol, currCellRow;
 
void __fastcall TForm1::StringGrid1MouseUp(TObject *Sender, TMouseButton Button,
      TShiftState Shift, int X, int Y)
{
  StringGrid1->MouseToCell(X, Y, currCellCol, currCellRow);
}
 
// Alter Cell
void __fastcall TForm1::Button2Click(TObject *Sender)
{
  StringGrid1->Cells[currCellCol][currCellRow] = Edit1->Text;
}
 
__fastcall TForm1::TForm1(TComponent* Owner)
  : TForm(Owner)
{
  StringGrid1->Cells[1][0] = "1234";
  StringGrid1->Cells[2][0] = "-1234";
  StringGrid1->Cells[3][0] = "0.5";
  StringGrid1->Cells[4][0] = "0";
  StringGrid1->Cells[0][1] = "";
  StringGrid1->Cells[0][2] = "0";
  StringGrid1->Cells[0][3] = "0.00";
  StringGrid1->Cells[0][4] = "#.##";
  StringGrid1->Cells[0][5] = "#,##0.00";
  StringGrid1->Cells[0][6] = "#,##0.00;(#,##0.00)";
  StringGrid1->Cells[0][7] = "#,##0.00;;Zero";
  StringGrid1->Cells[0][8] = "0.000E+00";
  StringGrid1->Cells[0][9] = "#.###E-0";
}

Uses

• System.SysUtils.FormatFloat ( fr | de | ja )
• System.SysUtils.StrToFloat ( fr | de | ja )