[Solved] COMP2421 Project 2

In this project you will implement a program that simulates a simple text editor with the undo/redo functionalities allowed. The program will accept statements, one at a time with a maximum of 100 characters per line.

There will be some special commands as follows:

1. undo: this will undo (i.e., remove) that last entered statement;
2. redo: this will redo (i.e., re-add) that last removed statement;
3. print: this command will print the entire stored input text; 4. save: will save the text to a file called (txt);
4. quit: will exit the program and save all results to output.txt

Execution example:

MyCommand > This is a test input

MyCommand > COMP2421 Data structures & Algorithms

MyCommand > test1

MyCommand > print

result >

This is a test input

COMP2421 Data structures & Algorithms test1

MyCommand > undo

result >

This is a test input

COMP2421 Data structures & Algorithms

MyCommand > redo

result >

This is a test input

COMP2421 Data structures & Algorithms test1

MyCommand > test2

MyCommand > test3

MyCommand > print

This is a test input

COMP2421 Data structures & Algorithms test1 test2 test3

MyCommand > quit result > Good Bye!

In your implementation, each statement should be stored in a different node. Implementing the undo/redo functionalities can be done through stacks. When printing all statements, you should make sure they are printed in the sequence they were entered.