# A guessing game where the computer thinks of a
# 2-digit number and the user tries to guess it.
# Two-digit number-guessing game with hinting.

import random

# Reports a hint about how many digits from the given
# guess match digits from the given correct number.
def matches(number, guess):
    num_matches = 0
    if guess // 10 == number // 10 or guess // 10 == number % 10:
        num_matches += 1
    if guess // 10 != guess % 10 and (guess % 10 == number // 10 or
            guess % 10 == number % 10):
        num_matches += 1
    return num_matches

def main():
    print("Try to guess my two-digit number, and I'll tell you")
    print("how many digits from your guess appear in my number.")
    print()

    # pick a random number from 0 to 99 inclusive
    number = random.randint(0, 99)

    # get first guess
    guess = int(input("Your guess? "))
    num_guesses = 1

    # give hints until correct guess is reached
    while guess != number:
        num_matches = matches(number, guess)
        print("Incorrect (hint:", num_matches, "digits match)")
        guess = int(input("Your guess? "))
        num_guesses += 1

    print("You got it right in", num_guesses, "tries.")

main()