为什么我的程序在使用这个循环结构时崩溃了？

Question

程序不断崩溃，我无法找出错误或导致其崩溃的原因

这就是我所拥有的，请告诉我我缺少什么

STATE_TAX_RATE = 0.6
CITY_TAX_RATE = 0.2

totalTax = itemPrice * STATE_TAX_RATE + itemPrice * CITY_TAX_RATE

totalPrice = itemPrice + totalTax

itemPrice = float(input("Enter price: "))

print("Item price is " + str(itemPrice) + " and total tax is " + str(totalTax))
print("Total price is " + str(totalTax))

Answer 1

看看这是作品吗

记下商品价格的顺序

STATE_TAX_RATE = 0.6
CITY_TAX_RATE = 0.2
itemPrice = float(input("Enter price: "))
totalTax = itemPrice * STATE_TAX_RATE + itemPrice * CITY_TAX_RATE

totalPrice = itemPrice + totalTax

print("Item price is " + str(itemPrice) + " and total tax is " + str(totalTax))
print("Total price is " + str(totalTax))

Answer 2

这里没有循环。如下所示重新排序代码将解决您的问题：

STATE_TAX_RATE = 0.6
CITY_TAX_RATE = 0.2

itemPrice = float(input("Enter price: "))

totalTax = itemPrice * STATE_TAX_RATE + itemPrice * CITY_TAX_RATE

totalPrice = itemPrice + totalTax


print("Item price is " + str(itemPrice) + " and total tax is " + str(totalTax))
print("Total price is " + str(totalTax))

Answer 3

名称错误：名称“itemPrice”未定义

这是您得到的错误，因为您在计算后（需要的地方）分配了 itemPrice，所以您得到一个 NameError

通过编写代码重新排序

itemPrice = float(input("Enter price: "))

在计算totalTax之前，你的错误应该被修正

完整正确的代码-

STATE_TAX_RATE = 0.6
CITY_TAX_RATE = 0.2

itemPrice = float(input("Enter price: "))
''' now it is assigned first so it will indeed carry out the calculation 
afterwards without any errors '''

totalTax = itemPrice * STATE_TAX_RATE + itemPrice * CITY_TAX_RATE

totalPrice = itemPrice + totalTax

print("Item price is " + str(itemPrice) + " and total tax is " + 
str(totalTax))
print("Total price is " + str(totalTax))