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主页 / user-686670

Outopsy's questions

Martin Hope
Outopsy
Asked: 2025-02-11 19:06:52 +0000 UTC

告诉我为什么 Switch case 1 将 0 返回到结果变量

  • 5

我编写了一个这样的计算器,我也在这里找到了控制台选项,我仍然只是弄清楚它是如何工作的,问题是添加之后,结果变量中会放置零,因此代码无法正常工作。

using System.Security.Cryptography.X509Certificates;

namespace ConsoleApp3
{
    public class Program
    {
        
        public static int val1 = 1;
        public static int val2 = 2;
        public static int result;
        public static bool ActionResult = false;

        static int Slozhenie(int val1, int val2, int result, bool ActionResult)
        {
            ActionResult = true;
            result = val1 + val2;
            return result;
        }

        static int Vychitanie(int val1, int val2, int result)
        {
            result = val1 - val2 ;
            bool ActionResult = true;
            return result;
        }

        static int Umnozhenie(int val1, int val2, int result)
        {
            result = val1 * val2;
            bool ActionResult = true;
            return result;
        }

        static int Delenie(int val1, int val2, int result)
        {
            result = val1 / val2;
            bool ActionResult = true;
            return result;
        }

        static int SlozhenieAfter(int val2, int result, bool ActionResult)
        {
            ActionResult = true;
            result = result * val2;
            return result;
        }
        public static int Start()
        {
            ActionResult = true;
           // done: // запускает все сначала
            string[] menuItems = new string[] { "Сложение", "Вычитание", "Деление", "Умножение" };

            Console.WriteLine("Меню\n");

            int row = Console.CursorTop;
            int col = Console.CursorLeft;
            int index = 0;
            while (true)
            {
                DrawMenu(menuItems, row, col, index);
                switch (Console.ReadKey(true).Key)
                {
                    case ConsoleKey.DownArrow:
                        if (index < menuItems.Length - 1)
                            index++;
                        break;
                    case ConsoleKey.UpArrow:
                        if (index > 0)
                            index--;
                        break;

                    case ConsoleKey.Enter:

                        switch (index)

                        {
                            case 0:
                                Console.WriteLine("\nРезультат сложения равен: " + Slozhenie(val1, val2, result, ActionResult));
                                return 1;
                            case 1:
                                Console.WriteLine("\nРезультат вычитания равен: " + Vychitanie(val1, val2, result));
                                return Vychitanie(val1, val2, result);
                            case 2:
                                Console.WriteLine("\nРезультат деления равен: " + Delenie(val1, val2, result));
                                return Delenie(val1, val2, result);
                            case 3:
                                Console.WriteLine("\nРезультат умножения равен: " + Umnozhenie(val1, val2, result));
                                return Umnozhenie(val1, val2, result);
                        }

                        break;

                }
            }
        }

        public static int StartAfter ()
        {
        done1: // запускает все сначала
            string[] menuItems = new string[] { "Сложение", "Вычитание", "Деление", "Умножение" };

            Console.WriteLine("Меню\n");

            int row = Console.CursorTop;
            int col = Console.CursorLeft;
            int index = 0;
            while (true)
            {
                DrawMenu(menuItems, row, col, index);
                switch (Console.ReadKey(true).Key)
                {
                    case ConsoleKey.DownArrow:
                        if (index < menuItems.Length - 1)
                            index++;
                        break;
                    case ConsoleKey.UpArrow:
                        if (index > 0)
                            index--;
                        break;

                    case ConsoleKey.Enter:

                        switch (index)

                        {
                            case 0:
                                Console.WriteLine("\nРезультат сложения равен: " + SlozhenieAfter(val2, result, ActionResult));
                                return 1;

                            case 1:
                                Console.WriteLine("\nРезультат вычитания равен: " + Vychitanie(val1, val2, result));
                                goto done1;
                            case 2:
                                Console.WriteLine("\nРезультат деления равен: " + Delenie(val1, val2, result));
                                goto done1;
                            case 3:
                                Console.WriteLine("\nРезультат умножения равен: " + Umnozhenie(val1, val2, result));
                                goto done1;
                        }

                        break;

                }
            }
        }
        static void DrawMenu(string[] items, int row, int col, int index)
        {
            Console.SetCursorPosition(col, row);
            for (int i = 0; i < items.Length; i++)
            {
                if (i == index)
                {
                    Console.BackgroundColor = Console.ForegroundColor;
                    Console.ForegroundColor = ConsoleColor.Black;
                }
                Console.WriteLine(items[i]);
                Console.ResetColor();
            }
            Console.WriteLine();
        }

        public static void Main(string[] args)
        {
            while (true) {
            if (ActionResult)
            {

                StartAfter();

                }
            else
            {

                    Start();
                }
            }
        }
    }
}

c#
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