feat: Implemented Typing Undo/Redo System

Src/Typing Undo-Redo System (OOP + Stack Implementation)/main.cpp

@@ -0,0 +1,191 @@
+#include <iostream>
+#include <stack>
+#include <string>
+#include <vector>
+
+using namespace std;
+
+/**
+ * TextEditor class - Manages typing, undo, and redo operations
+ */
+class TextEditor {
+private:
+    vector<string> currentText;  // Stores the current document text
+    stack<string> undoStack;     // Stack for undo operations
+    stack<string> redoStack;     // Stack for redo operations
+
+public:
+    /**
+     * Constructor - Initializes the text editor
+     */
+    TextEditor() {
+        cout << "Text Editor initialized!\n";
+    }
+
+    /**
+     * Type text - Adds new text to the document
+     * @param text The text to add
+     */
+    void typeText(const string& text) {
+        if (text.empty()) {
+            cout << "Error: Cannot add empty text!\n";
+            return;
+        }
+
+        undoStack.push(text);
+        currentText.push_back(text);
+
+        // Clear redo stack when new text is typed
+        while (!redoStack.empty()) {
+            redoStack.pop();
+        }
+
+        cout << "✓ Text added: \"" << text << "\"\n";
+    }
+
+    /**
+     * Undo - Removes the last typed text
+     */
+    void undo() {
+        if (undoStack.empty()) {
+            cout << "Nothing to undo!\n";
+            return;
+        }
+
+        string lastText = undoStack.top();
+        undoStack.pop();
+
+        redoStack.push(lastText);
+        currentText.pop_back();
+
+        cout << "↩ Undone: \"" << lastText << "\"\n";
+    }
+
+    /**
+     * Redo - Restores the most recently undone text
+     */
+    void redo() {
+        if (redoStack.empty()) {
+            cout << "Nothing to redo!\n";
+            return;
+        }
+
+        string textToRestore = redoStack.top();
+        redoStack.pop();
+
+        undoStack.push(textToRestore);
+        currentText.push_back(textToRestore);
+
+        cout << "↪ Redone: \"" << textToRestore << "\"\n";
+    }
+
+    /**
+     * Display the current document text
+     */
+    void showCurrentText() const {
+        cout << "\n\n";
+        cout << "📜 CURRENT DOCUMENT:\n";
+        cout << "\n";
+
+        if (currentText.empty()) {
+            cout << "[Empty Document]\n";
+        } else {
+            for (size_t i = 0; i < currentText.size(); i++) {
+                cout << currentText[i];
+                if (i < currentText.size() - 1) {
+                    cout << " ";
+                }
+            }
+            cout << "\n";
+        }
+
+        cout << "═══════════════════════════════════════\n\n";
+    }
+
+    /**
+     * Display statistics about the editor state
+     */
+    void showStats() const {
+        cout << "\n📊 Editor Statistics:\n";
+        cout << "   • Words typed: " << currentText.size() << "\n";
+        cout << "   • Undo available: " << undoStack.size() << "\n";
+        cout << "   • Redo available: " << redoStack.size() << "\n\n";
+    }
+
+    /**
+     * Destructor
+     */
+    ~TextEditor() {
+        cout << "Text Editor closed. Goodbye!\n";
+    }
+};
+
+/**
+ * Display the menu
+ */
+void displayMenu() {
+    cout << "\n";
+    cout << "//    TYPING UNDO/REDO SYSTEM MENU       //\n";
+    cout << "\n";
+    cout << "  1. ✍️  Type Text                      \n";
+    cout << "  2. ↩️  Undo Typing                    \n";
+    cout << "  3. ↪️  Redo Typing                    \n";
+    cout << "  4. 📜 Show Current Text               \n";
+    cout << "  5. 📊 Show Statistics                 \n";
+    cout << "  6. 🚪 Exit                            \n";
+    cout << "\n";
+    cout << "Enter your choice: ";
+}
+
+/**
+ * Main function - Entry point of the program
+ */
+int main() {
+    TextEditor editor;
+    int choice;
+    string text;
+
+    cout << "\n\n";
+    cout << "//  Welcome to Typing Undo/Redo System!  //\n";
+    cout << "\n";
+
+    do {
+        displayMenu();
+        cin >> choice;
+        cin.ignore(); // Clear the newline character from buffer
+
+        switch (choice) {
+            case 1:
+                cout << "Enter text to type: ";
+                getline(cin, text);
+                editor.typeText(text);
+                break;
+
+            case 2:
+                editor.undo();
+                break;
+
+            case 3:
+                editor.redo();
+                break;
+
+            case 4:
+                editor.showCurrentText();
+                break;
+
+            case 5:
+                editor.showStats();
+                break;
+
+            case 6:
+                cout << "\n🚪 Exiting program...\n";
+                break;
+
+            default:
+                cout << "❌ Invalid choice! Please select 1-6.\n";
+        }
+
+    } while (choice != 6);
+
+    return 0;
+}