A simple light-weight version of the famous mastermind game.
This application is a light-weight version of the popular game Mastermind. In this game, a randomly generated answer (master code) will be four (4) digits in length, with each digit between the numbers 1 and 6. After the player enters a combination, a minus (-) sign will be printed for every digit that is correct but in the wrong position, and a plus (+) sign will be printed for every digit that is both correct and in the correct position. Nothing will be printed for incorrect digits. The player will get ten (10) attempts to guess the number correctly. Otherwise, they will lose the game.