如何在python中显示未计算的变量？

Question

我正在做一项任务，要求我显示一个菜单，然后提示客户选择玫瑰类型和所选玫瑰的数量。我有一个累积变量要接受并用于最终的事务计算。但我如何让它显示未计算/输入的变量和价格，每当客户选择订购更多的玫瑰

elif roseTypeOrdered == 'r' or roseTypeOrdered == 'R':
        numRedRosesOrdered += int(input("How many red roses would you like to order?"))
        totalPrice += numRedRosesOrdered * STEM_RED_ROSE_PRICE
        print("You have selected {amount:.0f} red roses for a price of ${price:.2f}" .format(amount=numRedRosesOrdered, price=totalPrice))
        # Make sure you have a check to see if the input only Y or N
        transactionActive = input("Would you like to order more roses? (Y-yes, N-no)")
        if transactionActive == 'N' or transactionActive == 'n':
            break

按原样，如果输入R，4，Y（您为$8.00选择了4朵红玫瑰），则输入R，4，N（您为$24.00选择了8朵红玫瑰）。红玫瑰每朵2美元

Answer 1

这是因为每次通过循环，您都要将roses的运行总数numRedRosesOrdered添加到totalPrice，这本身就是一个运行总数。将numRedRosesOrdered更改为：

numRedRosesOrdered = int(input("How many red roses would you like to order?"))

…然后有一个单独的变量，比如totalNumRedRoses，定义如下：

totalNumRedRoses += numRedRosesOrdered

这是您将在摘要打印中使用的内容：

print("You have selected {amount:.0f} red roses for a price of ${price:.2f}" .format(amount = totalNumRedRoses , price = totalPrice))