Question

即使在选择再次播放后选择了其他运算符，该代码也会使用上次播放中选择的运算符。

我再次检查了功能，但仍然找不到确切的问题所在。

import random

print "Welcome!"

def get_choice():
    print "What are we practicing? \n1. Addition (+) \n2. Subtraction (-) \n3. Multiplication (*) \n4. Division (/)"

    option = raw_input('> ')

    while option != '+' and option != '-' and option != '*' and option != '/':
        print "You typed %r which is not valid. Please enter \'+, -, *,or /\'" %(option)
        option = raw_input('>')
    return option

operation = get_choice()

def ask_question (operation):
    numbers = []
    for y in range(0,2):
        x = random.randint(1,100)
        numbers.append(x)
    num1 = numbers[0]
    num2 = numbers[1]
    print num1, operation, num2
    response = int(raw_input('>'))
    return num1, num2, response

num1, num2, response = ask_question(operation)

def check_response(response):
    if operation == '+':
        answer = num1 + num2
    elif operation == '-':
        answer = num1 - num2
    elif operation == '*':
        answer = num1 * num2
    else:
        answer = num1 / num2

    i = 0
    if response == answer:
        print "Correct!"
    elif response != answer:
        while i < 2:
            print "Wrong! Try again: \n%r + %r" %(num1, num2)
            i += 1
            response = raw_input()
            if response != answer and i >= 2:
                print "Sorry. You run out of chances."

check_response(response)

def repeat():
    while True:
        print "Do you want to play again?"
        again = raw_input('>')
        if again == 'y' or again == 'Y':
            get_choice()
            ask_question(operation)
            check_response(response)
        else:
            break   
repeat()

欢迎光临！我们在练习什么？



加法（+）



减（-）



乘法（*）



除法（/）

  *



18 * 4

72对！你想再玩一次吗？

y


我们在练习什么？




加法（+）



减（-）



乘法（*）



除法（/）




+

94 * 83

Answer 1

它卡在一个操作上的原因是，在get_choice()中调用它时，您没有从repeat()捕获任何返回值。我将raw_input()调整为input()，以便可以使用它（我在python 3.X上，并且您也应该升级，因为2.X将于今年停产！），它现在看来对我来说很好：

def repeat():
    while True:
        print("Do you want to play again?")
        again = input('>')
        if again == 'y' or again == 'Y':
            operation = get_choice() # you need to assign "operator" to the return value
            ask_question(operation)
            check_response(response)
        else:
            break
repeat()

示例输出：

Welcome!
What are we practicing? 
1. Addition (+) 
2. Subtraction (-) 
3. Multiplication (*) 
4. Division (/)
> +
82 + 72
>154
Correct!
Do you want to play again?
>y
What are we practicing? 
1. Addition (+) 
2. Subtraction (-) 
3. Multiplication (*) 
4. Division (/)
> -
57 - 28 # the sign did in fact change to -
>

即使选择了不同的运算符，也会使用相同的运算符

1 个答案: