Undo/Redo String History in C++

This project demonstrates a simple implementation of undo and redo functionality using C++ with the help of std::stack and __declspec(property) to simulate property-like access similar to C#.

🧠 Features

• Set string values with history tracking
• Undo and redo previous values
• Uses two stacks internally: one for undo history, one for redo history
• Clean and simple interface using Value as a property

📁 Files

• clsMyString.h — The main class implementing the undo/redo logic
• main.cpp — A test driver demonstrating how the undo/redo system works

🔧 How It Works

• Set(string value): Pushes the current value onto the undo stack and sets the new value.
• Undo(): Pops the last value from the undo stack, pushes the current value to the redo stack, and restores the previous value.
• Redo(): Pops from the redo stack and re-applies a previously undone value.

✅ Sample Output

S1  = 
S1  = Mohammed
S1  = Mohammed2
S1  = Mohammed3

Undo: 
__________

S1  after undo = Mohammed2
S1  after undo = Mohammed
S1  after undo = 

Redo: 
__________

S1  after Redo = Mohammed
S1  after Redo = Mohammed2
S1  after Redo = Mohammed3

🧪 Example Usage

clsMyString s;
s.Value = "Hello";
s.Value = "World";
s.Undo(); // -> "Hello"
s.Redo(); // -> "World"

⚙️ Requirements

• Windows with MSVC (due to __declspec(property))
• C++11 or later
• No external dependencies

📌 Notes

• The use of __declspec(property) is Microsoft-specific and will not compile on GCC or Clang.
• For cross-platform compatibility, replace the property syntax with traditional getter/setter methods (Get() and Set()).

📜 License

This project is released under the MIT License.