我正在用python做一个加油站项目，有一个错误

Question

print ("Welcome to the Gas Station!")
infiniteLoop = True
total = 0  
while True and infiniteLoop :
   
   print ("\n Gasoline \n Market \n Restaurant \nTotal \n quit to exit")
   select = input("Select One:")
   
   if select == "Gasoline":
       select1 = input("92 - 1 manat \n95 - 1.40 manat \n Diesel - 0.90 cents \n Premium - 2 manat \nWhat Gasoline Do You Want:")
       l = int(input("type liter:"))
       if select1 == "92":
           a = l * 1
           total = total + a
           print(a, "Manat")
           print("Gasoline Injected.")
       elif select1 == "95":
            b = l * 1.40
            total+= b   # update total amount
            b = print(b, "Manat")
            print("Gasoline Injected.")

       elif select1 == "Diesel": # Diesel needs to be String "Diesel"
            c = l * 1.90 
            total = total + c  # update total
            print(c, "Manat")
            print("Gasoline Injected.")
       elif select1 == "Premium": # Premium needs to be sting, in your code has no quote
            d = l * 2.0
            total = total + d
            print(d, "Manat")
            print("Gasoline Injected.")
            
   elif select == "Total":
        print("Total Amount:", total)
    # terminate infinite loop 
   elif select == 'quit':
       infiniteLoop = False

我是Python新手，我正在做一个加油站项目，我还没有完成它，当我在代码中选择一个总数时，它说没有“a”元素，有人能帮忙吗

Answer 1

代码中的小问题

---

a。字符串“Diesel”不等于Diesel

b。压痕

c。可变范围等

不管怎样，这里有一个工作代码，运行它并检查你的代码有什么问题

print ("Welcome to the Gas Station!")
infiniteLoop = True
total = 0  
while True and infiniteLoop :
   
   print ("\n Gasoline \n Market \n Restaurant \nTotal \n quit to exit")
   select = input("Select One:")
   
   if select == "Gasoline":
       select1 = input("92 - 1 manat \n95 - 1.40 manat \n Diesel - 0.90 cents \n Premium - 2 manat \nWhat Gasoline Do You Want:")
       l = int(input("type liter:"))
       if select1 == "92":
           a = l * 1
           total = total + a
           print(a, "Manat")
           print("Gasoline Injected.")
       elif select1 == "95":
            b = l * 1.40
            total+= b   # update total amount
            b = print(b, "Manat")
            print("Gasoline Injected.")

       elif select1 == "Diesel": # Diesel needs to be String "Diesel"
            c = l * 1.90 
            total = total + c  # update total
            print(c, "Manat")
            print("Gasoline Injected.")
       elif select1 == "Premium": # Premium needs to be sting, in your code has no quote
            d = l * 2.0
            total = total + d
            print(d, "Manat")
            print("Gasoline Injected.")
            
   elif select == "Total":
        print("Total Amount:", total)
    # terminate infinite loop 
   elif select == 'quit':
       infiniteLoop = False