Cows and Bulls

Cows and Bulls is an old code-breaking mind or paper and pencil game for two or more players. This application is based on 4 digit number which does not have repeated digits. The game has two modes. Cow Mode: Your aim is to find out the 4 digit non repetitive number that the game has in its 'mind'. You can make one guess in every round. The game matches you guess with its number and responds with the number of Cows and Bulls based on matching digits. If the matching digits are in their right positions, they are "bulls", if in different positions, they are "cows" For example: If secret number is 4271 and your guess is 1234, there are 2 cows and 1 bull. Your aim is to guess the number in minimum number of guesses. Bull Mode: You have to think of 4 digit non-repetitive number in mind. The game tries to guess the number you have in mind. For every guess the game makes, you have to respond with the number of Cows and Bulls it contains.