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python - 尝试用python做一个基本的网上商店代码

问题描述

我是大学的预科生，所以我对编码很陌生。我正在为此苦苦挣扎，需要一些帮助，这是我目前编写的问题和代码：

“编写一个python程序来模拟一个在线商店。
程序应该首先显示产品列表及其价格。应该至少提供4种产品。程序应该要求用户选择产品，然后询问用户输入他们需要的产品数量。然后程序应该允许用户继续选择更多的产品和数量，直到他们输入一些东西来表明他们想要结束程序（例如给定的数字或“q”或“退出”） . 然后程序应该告诉用户他们选择的产品的总金额。

        shopping_basket = {}
        print("Welcome to the online drink store!\nThese are the drinks we offer\n1. Lemonade: £1.50\n2. 
        Coke: £2.00\n3. Fanta £1.00\n4. Water: £0.50")

        Price = {"Lemonade": 1.50, "Coke": 2.00, "Fanta": 1.00, "Water": 0.50 }

        option = int(input("Which drink would you like to purchase?: "))

        while option!= 0:
            if option == 1:
            qnty = int(input("Enter the quantity: "))
            total = qnty * 1.50
            print("The price is: " + str(total))
        elif option == 2:
            qnty = int(input("Enter the quantity: "))
            total = qnty * 2.00
            print("The price is: " + str(total))
        elif option == 3:
            qnty = int(input("Enter the quantity: "))
            total = qnty * 1.00
            print("The price is: " + str(total))
        elif option == 4:
            qnty = int(input("Enter the quantity: "))
            total = qnty * 0.50
            print("The price is: " + str(total))

            print("Would you like another item? enter Yes or No:")
        else:
            print("The total price of your basket is: " , total = Price * qnty)

这是我尝试过的代码，但在说明价格之后，它只是不断地询问数量。

标签： python

解决方案

我不想发布新答案，而是发表评论，但可惜，声誉不够。

我只是想添加到Daemon Painter的答案，并说最终的总账单也不起作用，因为它是将 dict 乘以 int。

可行的是在循环外初始化 total 变量以及新的 total_cost 变量，然后放置：

total_cost += total

在 while 循环内但在 if 条件外。这样最后一行可以是：

print("The total price of your basket is: ", total_cost)

编辑：代码，按预期工作：

    price = {"Lemonade": 1.50, "Coke": 2.00, "Fanta": 1.00, "Water": 0.50}
    shopping_basket = {}

    print("Welcome to the online drink store!\nThese are the drinks we offer\n1. Lemonade: £1.50\n2. Coke: £2.00\n3. Fanta £1.00\n4. Water: £0.50")

    buy_another_flag = 1
    total_cost, total = 0, 0

    while buy_another_flag != 0:
        option = int(input("Which drink would you like to purchase?: "))

        if option == 1:
            qnty = int(input("Enter the quantity: "))
            total = qnty * 1.50
            print("The price is: " + str(total))
        elif option == 2:
            qnty = int(input("Enter the quantity: "))
            total = qnty * 2.00
            print("The price is: " + str(total))
        elif option == 3:
            qnty = int(input("Enter the quantity: "))
            total = qnty * 1.00
            print("The price is: " + str(total))
        elif option == 4:
            qnty = int(input("Enter the quantity: "))
            total = qnty * 0.50
            print("The price is: " + str(total))

        total_cost += total

        buy_another_flag = int(input("Would you like another item? enter Yes (1) or No (0):"))
    print("The total price of your basket is: ", total_cost)

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