比萨饼订购程序不起作用

Question

我的代码有问题：

REG_PIZZA = ["Meatlovers", "Hot 'n' Spicy", "BBQ Chicken and Bacon", "Satay Chicken", "Super Supreme", "Seafood Deluxe"]
GOURM_PIZZA = ["Hawaiian", "Veg Deluxe", "Beef and Onion", "Ham and Cheese", "Pepperoni", "Cheese Supreme"]
numPizza = 0
selection = 0
totalCost = 0
deliverCost = 3

    def orderPizza():

        global numPizza
        global selection 
        global order
        global totalCost   

    pizzaOrder = 0
    order = []

    if pizzaOrder < numPizza:

        print(" ") 
        print(" ")
        print(" ")
        print("=======Regular Pizza's=======")
        print("Press 1 for " + REG_PIZZA[0] + " - $8.50")
        print("Press 2 for " + REG_PIZZA[1] + " - $8.50")
        print("Press 3 for " + REG_PIZZA[2] + " - $8.50")
        print("Press 4 for " + REG_PIZZA[3] + " - $8.50")
        print("Press 5 for " + REG_PIZZA[4] + " - $8.50")
        print("Press 6 for " + REG_PIZZA[5] + " - $8.50")
        print("=======Gourmet Pizza's=======")
        print("Press 7 for " + GOURM_PIZZA[0] + " - $5.00")
        print("Press 8 for " + GOURM_PIZZA[1] + " - $5.00")
        print("Press 9 for " + GOURM_PIZZA[2] + " - $5.00")
        print("Press 10 for " + GOURM_PIZZA[3] + " - $5.00")
        print("Press 11 for " + GOURM_PIZZA[4] + " - $5.00")
        print("Press 12 for " + GOURM_PIZZA[5] + " - $5.00")
        print("==========Exit Menu==========")
        print("Press 0 to Exit")
        print("=============================")        
        selection = raw_input("Enter your choice (0-12):  ")

        if selection == 0:
            sys.exit()
        elif selection == 1:
            print(REG_PIZZA[0], "- $8.50")
            order.append(REG_PIZZA[0])
            print(order)
            pizzaOrder = pizzaOrder + 1
            totalCost = totalCost + 8.50
            print(" ")
            print(" ")
            print(" ")
        elif selection == 2:
            print(REG_PIZZA[1], "- $8.50")
            order.append(REG_PIZZA[1])
            print(order)
            pizzaOrder = pizzaOrder + 1
            totalCost = totalCost + 8.50
            print(" ")
            print(" ")
            print(" ")
        elif selection == 3:
            print(REG_PIZZA[2], "- $8.50")
            order.append(REG_PIZZA[2])
            print(order)
            pizzaOrder = pizzaOrder + 1
            totalCost = totalCost + 8.50
            print(" ")
            print(" ")
            print(" ")
        elif selection == 4:
            print(REG_PIZZA[3], "- $8.50")
            order.append(REG_PIZZA[3])
            print(order)
            pizzaOrder = pizzaOrder + 1
            totalCost = totalCost + 8.50
            print(" ")
            print(" ")
            print(" ")  
        elif selection == 5:
            print(REG_PIZZA[4], "- $8.50")
            order.append(REG_PIZZA[4])
            print(order)
            pizzaOrder = pizzaOrder + 1
            totalCost = totalCost + 8.50
            print(" ")
            print(" ")
            print(" ")
        elif selection == 6:
            print(REG_PIZZA[5], "- $8.50")
            order.append(REG_PIZZA[5])
            print(order)
            pizzaOrder = pizzaOrder + 1
            totalCost = totalCost + 8.50
            print(" ")
            print(" ")
            print(" ")
        elif selection == 7:
            print(GOURM_PIZZA[0], "- $5.00")
            order.append(GOURM_PIZZA[0])
            print(order)
            pizzaOrder = pizzaOrder + 1
        totalCost = totalCost + 5.00
        print(" ")
        print(" ")
        print(" ")
    elif selection == 8:
        print(GOURM_PIZZA[1], "- $5.00")
        order.append(GOURM_PIZZA[1])
        print(order)
        pizzaOrder = pizzaOrder + 1
        totalCost = totalCost + 5.00
        print(" ")
        print(" ")
        print(" ")
    elif selection == 9:
        print(GOURM_PIZZA[2], "- $5.00")
        order.append(GOURM_PIZZA[2])
        print(order)
        pizzaOrder = pizzaOrder + 1
        totalCost = totalCost + 5.00
        print(" ")
        print(" ")
        print(" ")
    elif selection == 10:
        print(GOURM_PIZZA[3], "- $5.00")
        order.append(GOURM_PIZZA[3])
        print(order)
        pizzaOrder = pizzaOrder + 1
        totalCost = totalCost + 5.00
        print(" ")
        print(" ")
        print(" ")
    elif selection == 11:
        print(GOURM_PIZZA[4], "- $5.00")
        order.append(GOURM_PIZZA[4])
        print(order)
        pizzaOrder = pizzaOrder + 1
        totalCost = totalCost + 5.00
        print(" ")
        print(" ")
        print(" ")
    elif selection == 12:   
        print(GOURM_PIZZA[5], "- $5.00")
        order.append(GOURM_PIZZA[5])
        print(order)
        pizzaOrder = pizzaOrder + 1
        totalCost = totalCost + 5.00
        print(" ")
        print(" ")
        print(" ")
    elif pizzaOrder == numPizza and numPizza == 1:
        print("==Order Details==")
        print(order)
        print("Total Cost:", totalCost)
        print("==Thank You", customerName + "==")

    elif pizzaOrder == numPizza and numPizza == 2:
        print("==Order Details==")
        print(order[0])
        print(order[1])
        print("Total Cost:", totalCost)
        print("==Thank You", customerName + "==") 

    elif pizzaOrder == numPizza and numPizza == 3:
        print("==Order Details==")
        print(order[0])
        print(order[1])
        print(order[2])
        print("Total Cost:", totalCost)
        print("==Thank You", customerName + "==")

    elif pizzaOrder == numPizza and numPizza == 4:
        print("==Order Details==")
        print(order[0])
        print(order[1])
        print(order[2])
        print(order[3])
        print("Total Cost:", totalCost)
        print("==Thank You", customerName + "==")

    elif pizzaOrder == numPizza and numPizza == 5:
        print("==Order Details==")
        print(order[0])
        print(order[1])
        print(order[2])
        print(order[3])
        print(order[4])
        print("Total Cost:", totalCost)
        print("==Thank You", customerName + "==")




def deliveryPickup():

    option = int(input("Delivery or Pickup? (1 - Delivery OR 2 - Pickup):   "))

    if option < 1 or option > 2:       
        print("That is not a valid input - Try Again")

    global numPizza  
    global totalCost

    if option == 1:

        totalCost = totalCost + 3
        customerAddress = raw_input("Enter your Address: ")
        customerPhone = raw_input("Enter your phone number: ")
        print("Thank you", customerName, "Your Address is", customerAddress, "and your phone    number is", customerPhone)
        print(" ")
        numPizza = raw_input("Enter number of Pizza's Wanted (Max 5):  ")
        print(" ")
        print(" ")
        print(" ")
        print(" ")
        orderPizza()

    if option == 2:
        numPizza = raw_input("Enter number of Pizza's Wanted (Max 5):  ")
        print(" ")
        print(" ")
        print(" ")
        print(" ")
        orderPizza()


customerName = raw_input("Enter your name please: ")

deliveryPickup()

这是我输入的：

^{pr2}$

怎么了？ 我好像想不通，我已经把菜单重新写了三次了。 当你选择比萨饼的时候，它就断了

Answer 1

您必须将您的selection转换为int。这样它就可以工作了：

selection = int(raw_input("Enter your choice (0-12): "))

而不是：

selection = raw_input("Enter your choice (0-12): ")

或者为了获得更大的灵活性：

try:
    selection = int(raw_input("Enter your choice (0-12):  "))
except ValueError:
    selection = 0

Answer 2

你需要把选择转换成整数

selection = int(raw_input("Enter your choice (0-12):  "))

最好使用while循环和try/except检查输入的数据是否对所有输入都正确，如果将selection转换为int，而有人输入字符串，则程序将崩溃。在