Exemplo n.º 1
0
        // ============ ВЫПОЛНЕНИЕ ДЕЙСТВИЯ НАД ДВУМЯ ЧИСЛАМИ ============

        public static void Calculate(MyStack <float> numbers, MyStack <string> symbols)
        {
            float  b      = numbers.Pop();
            float  a      = numbers.Pop();
            string sym    = symbols.Pop();
            float  result = 0;

            switch (sym)
            {
            case "+":
                result = a + b;
                break;

            case "-": result = a - b;
                break;

            case "*": result = a * b;
                break;

            case "/": result = a / b;
                break;
            }
            numbers.Push(result);
        }
Exemplo n.º 2
0
        // ============ ПОДСЧЕТ ЗНАЧЕНИЯ ВЫРАЖЕНИЯ ============

        public static void SolveProblem(string[] problem)
        {
            MyStack <float>  numbers = new MyStack <float>();
            MyStack <string> symbols = new MyStack <string>();

            foreach (var el in problem)
            {
                float number;
                bool  success = float.TryParse(el, out number);
                if (success)
                {
                    numbers.Push(number);
                }
                else if (symbols.IsEmpty)
                {
                    symbols.Push(el);
                }
                else if (el == "*" || el == "/")
                {
                    if (symbols.Peek() == "+" || symbols.Peek() == "-")
                    {
                        symbols.Push(el);
                    }
                    else
                    {
                        while (!symbols.IsEmpty && symbols.Peek() != "+" && symbols.Peek() != "-")
                        {
                            Calculate(numbers, symbols);
                            if (symbols.IsEmpty)
                            {
                                symbols.Push(el);
                                break;
                            }
                            else if (symbols.Peek() == "+" || symbols.Peek() == "-")
                            {
                                symbols.Push(el);
                                break;
                            }
                        }
                    }
                }
                else
                {
                    while (!symbols.IsEmpty)
                    {
                        Calculate(numbers, symbols);
                        if (symbols.IsEmpty)
                        {
                            symbols.Push(el);
                            break;
                        }
                    }
                }
            }

            while (!symbols.IsEmpty)
            {
                Calculate(numbers, symbols);
            }
            Console.WriteLine($"Result: {numbers.Pop()}");
        }