Question

我当前正在尝试创建程序，但需要一些帮助。我是编码的新手，并尝试过在线查找答案。程序打开时我有一个菜单，一旦调用一个选项（有6个选项），它就需要打印一张表。到目前为止，我有

    def main ():
      choice = printMenu()
      print (choice)

    def printMenu ():
      print("Astronaut Mass Allowance Calculator")
      print("A: Display Program options")
      print("B: Display Destinations with Mass Multipliers")
      print("C: Display Weight allowances for astronauts")
      print("D: Calculate Personal Mass allowances")
      print("E: Calculate Average Available mass and weight")
      print("X: Exit")
      print("Enter A, B, C, D, E or X to proceed:")

    main()

一旦输入了字母，我怎么称呼其余的？

Answer 1

在您的代码printMenu中不返回任何内容。因此choice = printMenu()是没有用的。您应该使用input或raw_input（取决于python版本）来读取用户输入，然后使用

if choice == "A":
  displayProgramOptions()
elif choice == "B":
  // ...
else:
  print("Unknown option")

或使用dict可以将字符串映射为函数。即

funcs = {
  "A": displayProgramOptions,
  "B": displayDestinationsWithMassMultipliers,
  // ...
}

if choice in funcs:
  funcs[choice]()
else:
  print("Unknown option")

Answer 2

我从您的问题中了解到，您希望用户查看打印的菜单并选择一个选项。然后，根据用户的输入，您希望您的程序采取进一步的行动。如果这是您所期望的，那么我建议从“菜单选项”中删除最后的打印，并使其成为“输入”的一部分，并像这样使用它：

def main ():
      printMenu()
      ip = input("Enter A, B, C, D, E or X to proceed:")
      #do what you want with this option
      print("you entered: " + ip)

def printMenu ():
      print("Astronaut Mass Allowance Calculator")
      print("A: Display Program options")
      print("B: Display Destinations with Mass Multipliers")
      print("C: Display Weight allowances for astronauts")
      print("D: Calculate Personal Mass allowances")
      print("E: Calculate Average Available mass and weight")
      print("X: Exit")
      #Last line removed from here

main()

Answer 3

为了捕获响应，您可以使用input（）函数。您需要进一步的帮助吗？

def main ():
  choice = printMenu()
  print (choice)
  # Do something here with the choice, as P.Dmitry suggests.

def printMenu ():
  print("Astronaut Mass Allowance Calculator")
  print("A: Display Program options")
  print("B: Display Destinations with Mass Multipliers")
  print("C: Display Weight allowances for astronauts")
  print("D: Calculate Personal Mass allowances")
  print("E: Calculate Average Available mass and weight")
  print("X: Exit")
  return input("Enter A, B, C, D, E or X to proceed:")

main()

Answer 4

我会将逻辑分解为单独的函数，以便它们每个都可以输出自己的信息：

  def A():
    print('A CODE HERE')
  def B():
    print('B CODE HERE')
  def C():
    print('C CODE HERE')
  def D():
    print('D CODE HERE')
  def E():
    print('E CODE HERE')
  def X():
    quit()

  def main():
    choice = printMenu()
    print('YOU CHOSE:', choice)
    if choice == 'A':
      A()
    elif choice == 'B':
      B()
    elif choice == 'C':
      C()
    elif choice == 'D':
      D()
    elif choice == 'E':
      E()
    elif choice == 'X':
      X()

  def printMenu():
    print("Astronaut Mass Allowance Calculator")
    print("A: Display Program options")
    print("B: Display Destinations with Mass Multipliers")
    print("C: Display Weight allowances for astronauts")
    print("D: Calculate Personal Mass allowances")
    print("E: Calculate Average Available mass and weight")
    print("X: Exit")
    # Collect input from the user.
    choice = input("Enter A, B, C, D, E or X to proceed: ")
    # Return the input.
    return choice.upper()

  while True: # Infinitely display the choice menu
    main()

在没有GUI的情况下开发程序

4 个答案: