private void calculate() { String expr = textBox1.Text; textBox1.Clear(); textBox1.Text = SevenConverter.FromDec(Expression.ParseExpr(ref expr)); }
public static int ParseNumber(ref string expr) { string numberTemp = ""; int initialLength = expr.Length; for (int i = 0; i < initialLength; i++) { if (char.IsDigit(expr[0])) { numberTemp += expr[0]; expr = expr.Substring(1, expr.Length - 1); } else { break; } } return(SevenConverter.ToDec(numberTemp)); }