public static void SolutionManager(string formula, string usedVariable, bool closeAll, Dictionary <string, bool> methodsCheckDictionary)
{
// check if any methods were used
if (Array.TrueForAll(methodsCheckDictionary.Values.ToArray(), (x) => (!x)))
{
ShowErrorMessageBox("Не выбраны способы решения", "Пожалуйста, отметьте хотя бы один способ решения");
return;
}
// if user wants unused windows to be closed
if (closeAll)
{
foreach (var f in openedRootsWindows)
{
f.Close();
}
}
try
{
// convert to reverse polish notation
string parsedFormula = FParser.MainParser(formula, usedVariable);
// string formula -> function f(x)
Func <double, double> parsedFunction = FuncConstructor.MainConstructor(parsedFormula, usedVariable);
// dictionary with all methods
Dictionary <string, Func <Func <double, double>, List <double> > > methodsFuncDictionary = new Dictionary <string, Func <Func <double, double>, List <double> > >()
{
{ "Bisection (1)", Dichotomy.MainSolver },
{ "Bisection (2)", SmallSegments.MainSolver },
{ "Newton", Newton.MainSolver },
{ "Chord", Chords.MainSolver },
{ "Fixed Point", FixedPoint.MainSolver }
//{"New method name", newClass.newSolver}
};
// dictionary with lists of roots from all methods {"Method name", foundRootsList}
Dictionary <string, List <double> > allRootsDictionary = new Dictionary <string, List <double> >();
// iterate over all used methods
foreach (string methodName in methodsCheckDictionary.Keys)
{
// if method is not used
if (!methodsCheckDictionary[methodName])
{
continue;
}
List <double> foundRoots = methodsFuncDictionary[methodName](parsedFunction);
foundRoots.Sort();
allRootsDictionary.Add(methodName, foundRoots);
}
// create and show window with roots output
RootsOutput rootsOutput = new RootsOutput(formula, allRootsDictionary);
openedRootsWindows.Add(rootsOutput);
rootsOutput.Show();
}
catch (Exception ex)
{
if (ex is WrongElementException || ex is NotEquationException || ex is SyntaxException || ex is TooManyRootsException)
{
ShowErrorMessageBox("Ошибка", ex.Message);
}
else
{
ShowErrorMessageBox("Ошибка", "Неизвестная ошибка\nПроверьте введённую формулу ещё раз или перезапустите программу");
}
}
}
public static string MainParser(string formula, string variable)
{
usedVariable = variable;
formula = formula.ToLower();
formula = formula.Replace(" ", "");
if (!formula.Contains("=") || formula.EndsWith("="))
{
// formula is not an equation
throw new NotEquationException("Введите уравнение\nТакая запись некорректна, проверьте ещё раз");
}
if (SymbolCount(formula, '(') != SymbolCount(formula, ')'))
{
//missing bracket
throw new SyntaxException("Вы пропустили одну или несколько скобок\nТакая запись некорректна, проверьте ещё раз");
}
if (usedVariable == "")
{
// no variable chosen
throw new NotEquationException("Введите имя переменной, по которой будет решаться уравнение");
}
if (!formula.Contains(usedVariable))
{
// no variable in equation
throw new NotEquationException("В выражении отстутсвует переменная, по которой будет решаться уравнение\nПроверьте введённую формулу ещё раз");
}
// all terms to the left
formula = formula.Replace("=", "-(") + ")";
// all formula to brackets (nothing is changed mathematically, but easier to process
formula = "(" + formula + ")";
string[] ops = { "+", "-", "*", "/", "^", "(", ")" };
foreach (string op in ops)
{
// distinguish operators and brackets with whitespaces
formula = formula.Replace(op, " " + op + " ");
}
// remove double whitespaces
formula = formula.Replace(" ", " ");
// remove whitespaces in the beginning and in the end
formula = formula.Trim();
// change all unary minuses, so -3x becomes 0-3x
formula = formula.Replace("( - ", "( 0 - ");
// process cases like 45x or 6sin(y), when * is missing
string[] pArr = { usedVariable, "sin", "cos", "tg", "ctg", "ln", "lg", "sqrt", "arcsin", "arccos", "arctg", "arcctg", "e", "pi" };
foreach (string p in pArr)
{
int displacement = 0;
// pattern that matches such cases
string prPattern = $@"([0-9]+){p}";
var matches = Regex.Matches(formula, prPattern);
foreach (Match match in matches)
{
// only num part of match, like 45 from 45x
string numMatch = match.Value.Replace(p, "");
// after replacement have 45 * x instead of 45x
formula = formula.Substring(0, match.Index + displacement) + numMatch + " * " + p + formula.Substring(match.Index + displacement + match.Length);
displacement += 3;// len("45x") + 3 = len("45 * x")
}
}
FParser FP = new FParser();
return(FP.Compile(formula.Split(' ')));
}
