拆分代码7

shell/Commands/Utility/CalcCommand.cs

@@ -0,0 +1,59 @@
+using System;
+
+namespace CMLeonOS.Commands.Utility
+{
+    public static class CalcCommand
+    {
+        public static void Calculate(string expression, Action<string> showError)
+        {
+            try
+            {
+                var parts = expression.Split(' ');
+                if (parts.Length == 3)
+                {
+                    double num1 = double.Parse(parts[0]);
+                    string op = parts[1];
+                    double num2 = double.Parse(parts[2]);
+                    double result = 0;
+
+                    switch (op)
+                    {
+                        case "+":
+                            result = num1 + num2;
+                            break;
+                        case "-":
+                            result = num1 - num2;
+                            break;
+                        case "*":
+                            result = num1 * num2;
+                            break;
+                        case "/":
+                            if (num2 != 0)
+                            {
+                                result = num1 / num2;
+                            }
+                            else
+                            {
+                                showError("Division by zero");
+                                return;
+                            }
+                            break;
+                        default:
+                            showError("Invalid operator. Use +, -, *, /");
+                            return;
+                    }
+
+                    Console.WriteLine($"Result: {result}");
+                }
+                else
+                {
+                    showError("Invalid expression. Use format: calc <num> <op> <num>");
+                }
+            }
+            catch (Exception ex)
+            {
+                showError($"Error: {ex.Message}");
+            }
+        }
+    }
+}