Dots and Pluses Number Game

Dots and Pluses Number Game © 1977 Hopkins, Ralph.

A Mastermind variant. The computer thinks of a number and after each guess from the player will give dots (correct digit in wrong position) and pluses (correct digit) or a goose egg (nothing correct). The player can choose if a digit can be in the code more than once and the size of the code (three to five digits).