private void Calc(String expr) { try { m_history.Add(expr); meHistory.SelectionColor = System.Drawing.Color.Blue; meHistory.AppendText(expr); meHistory.AppendText("\r\n"); meHistory.SelectionColor = System.Drawing.Color.Black; m_parser.SetDecSep(cbDec.Text.ToCharArray()[0]); // default: "." m_parser.SetArgSep(cbArg.Text.ToCharArray()[0]); // default: "," m_parser.SetExpr(expr); m_ans.Value = m_parser.Eval(); string result = Convert.ToString(m_ans.Value); meHistory.AppendText(String.Format("{0} = ", m_parser.GetExpr())); meHistory.AppendText(result); meHistory.AppendText("\r\n"); } catch (ParserException exc) { DumpException(exc); } }