Question

问题在于：企业根据购买的单位数量和单价应用折扣。编写一个应用程序，询问用户单位数量和单价，并计算和打印总价格，应用的折扣和总折扣价格。如果单位数量为零或更少，或者每单位价格为0欧元或更低，则显示合适的错误消息。

这是我的代码：

units_brought = float(input("Enter the number of units brought "))
unit_price = float(input("Enter the unit price "))

total_price = units_brought * unit_price

discount_applied = float(0)

total_discounted_price = total_price - discount_applied

if units_brought in range(1, 49) and unit_price in range(0.01, 10) :
    print("The total price is ",total_price,"\nThe discount applied is",discount_applied,"\nThe total discounted price is ",total_discounted_price)

    if unit_price in range(10.01, 100) :
        discount_applied = total_price * 0.05
        print("The total price is ", total_price, "\nThe discount applied is", discount_applied,"\nThe total discounted price is ", total_discounted_price)

    elif unit_price >= 100.1:
            discount_applied= total_price * 0.08
            print("The total price is ", total_price, "\nThe discount applied is", discount_applied,"\nThe total discounted price is ", total_discounted_price)

elif units_brought in range(50, 99) and unit_price in range(0.01, 10) :
    discount_applied = total_price * 0.12
    print("The total price is ", total_price, "\nThe discount applied is", discount_applied,
          "\nThe total discounted price is ", total_discounted_price)

    if unit_price in range(10.01, 100) :
        discount_applied = total_price * 0.18
        print("The total price is ", total_price, "\nThe discount applied is", discount_applied,
              "\nThe total discounted price is ", total_discounted_price)

    elif unit_price >= 100.01:
            discount_applied = total_price * 0.22
            print("The total price is ", total_price, "\nThe discount applied is", discount_applied,
                  "\nThe total discounted price is ", total_discounted_price)

elif units_brought >= 100 and unit_price in range(0.01, 10) :
    discount_applied = total_price * 0.21
    print("The total price is ", total_price, "\nThe discount applied is", discount_applied,
          "\nThe total discounted price is ", total_discounted_price)

    if unit_price in range(10.01, 100):
        discount_applied = total_price * 0.32
        print("The total price is ", total_price, "\nThe discount applied is", discount_applied,
              "\nThe total discounted price is ", total_discounted_price)

    elif unit_price >= 100.01:
        discount_applied = total_price * 0.43
        print("The total price is ", total_price, "\nThe discount applied is", discount_applied,
              "\nThe total discounted price is ", total_discounted_price)

elif units_brought <= 0:
    print("The number of units brought can't be zero or less")

elif unit_price <= 0:
    print("The unit price can't be zero or less")

运行时会发生这种情况：

Enter the number of units brought 5
Enter the unit price 4
Traceback (most recent call last):
  File "C:/Users/User/Documents/My code/business_price_&_discounts.py", line 19, in <module>
    if units_brought in range(1, 49) and unit_price in range(0.01, 10) :
TypeError: 'float' object cannot be interpreted as an integer

Process finished with exit code 1

所以问题似乎是if语句中的范围函数不能有浮点数，同时我的值需要小数，我的问题是，这里是否有替代范围函数？

Answer 1

您在表格中的比较

transform

不起作用，因为if unit_price in range(10.01, 100):只接受整数参数。相反，您可以使用比较链来编写

range

另请注意，范围中的if 10.01 <= unit_price < 100:参数是 exclusive ，因此我在该比较中使用了to。但是，在您的情况下，您可能需要检查< 100，因为在以下<= 100中您测试elif。另请注意，由于浮点数学，值可能介于>= 100.1和100.0之间，即使您只使用100.1的增量，因此您可能希望测试{{1以下0.1中的<= 100和if。

此代码中范围和浮点替代的混合

1 个答案: