Request from customer

• Besides numbers, the system should be able to sort text, such as characters or strings
• Add selection sort
• When running the sorting, it should be easy for users to distinguish the difference between algorithms
• Users can choose to sort in ascending or descending order
• Users can choose to randomize the input data in addition to input manually or read from files
• (optional) Input data from a database
• modularize the system into several components with well-defined interfaces for communicating with each other

Additional improvements

• Add console UI
• Fix Show and every Sort to support double
• Better GUI
• More sort