Python中的基本5选择轮盘游戏

Question

new python guy here

so i am trying to make a basic roulette game with 5 choices for the player to choose from. i managed to get the script to run without errors, but the section under "win_loss" doesn't seem to be registering, or at least not the if/elif parts. i can only assume that i didn't identify something correctly at the top.

tho i would gladly accept a finished answer, guidance would probably help me lean more. either way, all help is welcome.

import random

red = (1,3,5,7,9,12,14,16,18,21,23,25,27,30,32,34,36)
black = (2,4,6,8,10,11,13,15,17,19,20,22,24,26,28,29,31,33,35)
green = 0
even = (2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36)
odd = (1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35)

def main():
    print('Red = 1')
    print('Black = 2')
    print('Green = 3')
    print('Odd = 4')
    print('Even = 5')
    print('-=-=-=-=-=-=-=-=-=-=-')
    player = int(input('Place your bet, 1-5: '))
    print('-=-=-=-=-=-=-=-=-=-=-')

    roll()
    win_loss()

def roll():
    spin = random.randint(1,36)
    print('Landed on: ',spin)
    print('-=-=-=-=-=-=-=-=-=-=-')

def win_loss():
    if (roll) == red:
        print('You won $.45')
    elif (roll) == black:
        print('You won $.45')
    elif (roll) == green:
        print('You won $5.00')
    elif (roll) == even:
        print('You won $.45')
    elif (roll) == odd:
        print('You won $.45')
    else:
        print('You lost')

main()

Answer 1

Your function don't return anything and they don't accept parameters. To have your win_loss() function know what the result of the roll was you need to do somehting like this:

def roll():
    return random.randint(0,36)  # Pointed out by Lallen, you need to include 0
    # move the print statements outside the function

def win_loss(roll):  # note the parameter here
    if (roll) == red:
        print('You won $.45')
    elif (roll) == black:
        print('You won $.45')
    elif (roll) == green:
        print('You won $5.00')
    elif (roll) == even:
        print('You won $.45')
    elif (roll) == odd:
        print('You won $.45')
    else:
        print('You lost')

And in your script:

result = roll()
win_loss(result)

Read more about functions and parameters here.

enter code here

Also note that your Boolean operations will not work. You need to test if the result of the roll is in your tuples not equal to them. Something like this:

# Note the curly braces. As Marius suggested using sets here will make your program a little more efficient
red = {1,3,5,7,9,12,14,16,18,21,23,25,27,30,32,34,36}
black = {2,4,6,8,10,11,13,15,17,19,20,22,24,26,28,29,31,33,35}
green = 0
even = {2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36}
odd = {1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35}

...

def win_loss(roll):  # note the parameter here
    if roll in red:  
        print('You won $.45')

This will work much better now as 1 in red will be True while 1 == red will be False .

You will also need to make sure the players bet was a winning/losing one:

def win_loss(roll, player):  # note the new player parameter here
        if roll in red and player == 1:  # note the comparison between the players input and the choices you laid out in the beginning.
            print('You won $.45')

That extra Boolean expression will make sure the roll was in red and that the player bet on red. This will have to be done for all the different checks.

These as well as the points listed in the comments are some things that will help you along. I would strongly suggest doing a bit more reading or perhaps some online tutorials as there are a lot of potential problems in your code.