#craps.py -- Simulates multiple games of craps
#   and estimates the probability that the player wins.

import random

def output(wins, total):
    winrate = wins / total
    print("The player won {0} of {1} games ({2:0.2%})".format(wins, total, winrate))

def rolldies():
    dice1 = random.randint(1, 6)
    dice2 = random.randint(1, 6)
    roll = dice1 + dice2
    return roll

def simOneGame():
    initial_roll = rolldies()
    if initial_roll == 2 or initial_roll == 3 or initial_roll == 12:
        return True     # won
    elif initial_roll == 7 or initial_roll == 11:
        return False    #lost
    else:
        #Roll until roll is 7 or initial roll
        roll = rolldies()
        while roll != 7 and roll != initial_roll:
            roll = rolldies()
        if roll == 7:
            return True     #won
        else:
            #roll is inital_roll
            return False    #lost

def simNGames(games_to_sim):
    wins = 0
    for i in range(games_to_sim):
        if simOneGame():
            wins += 1
    return wins

def main():
    games_to_sim = int(input("How many games to simulate? "))
    wins = simNGames(games_to_sim)
    output(wins, games_to_sim)

if __name__ == "__main__":
    main()