static public string AskFormula(string text)
{
string output;
Console.Write("\r" + new string(' ', Console.WindowWidth - Console.CursorLeft) + "\r" + text);
output = Console.ReadLine();
while (!Rpn.IsExpressionCorrectly(output, out string errorText))
{
Console.SetCursorPosition(0, 0);
Console.Write("\r" + new string(' ', Console.WindowWidth - Console.CursorLeft) + "\r" + errorText);
Console.ReadKey(true);
Console.Write("\r" + new string(' ', Console.WindowWidth - Console.CursorLeft) + "\r" + text);
output = Console.ReadLine();
}
return(output);
}
public bool FormulaCorrectlyTest(string formula)
{
return(Rpn.IsExpressionCorrectly(formula, out string s));
}