/// <summary>
/// Will solve problem with minus before brackets and on another locations
/// </summary>
/// <param name="equation">string containing equation</param>
/// <returns>equation</returns>
private static string FixMinusOperator(string equation)
{
// get all locations of minus char in equation
List <int> indexes = StringControl.GetAllIndexesOf(equation, Strings.Minus);
// check all minuses (must be checking from the end because of adding to equation string on index)
// add plus to equation if needed
for (int index = indexes.Count - 1; index >= 0; --index)
{
if (indexes[index] > 0 && !Operators.IsLastCharOfTwoArgumentsOperator(equation[indexes[index] - 1]))
{
equation = equation.Insert(indexes[index], Strings.Plus);
}
}
return(equation);
}
/// <summary>
/// Will move factorial operator before its argument for easier tree creating
/// </summary>
/// <param name="equation">string containing equation</param>
/// <returns>equation</returns>
private string MoveFactorialOperatorForCreatingTree(string equation)
{
List <int> indexes = StringControl.GetAllIndexesOf(equation, Strings.Factorial);
//for (int index = indexes.Count - 1; index >= 0; --index)
// equation = equation.Remove(indexes[index], Strings.Factorial.length)
// .Insert(indexes[index], ")")
// .Insert(GetStartingIndexOfNumberOrStringInsideBracketOnIndex(equation, indexes[index] - 1), "(" + Strings.Factorial);
foreach (int index in indexes)
{
equation = equation.Remove(index, Strings.Factorial.Length);
equation = equation.Insert(GetStartingIndexOfNumberOrStringInsideBracketOnIndex(equation, index - 1),
Strings.Factorial);
}
return(equation);
}
