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这是我的完整代码我不确定问题是什么

option = 0

while option !=4:

在我在每个选项选择中沿打印菜单重复类似代码之前，但我将其从 while 更改为 if 和 elif 但不起作用？

    # Prints the menu to the screen


print("*** Menu *** \n")
print("1. Encrypt string")
print("2. Decrypt string")
print("3. Brute force decryption")
print("4. Quit \n")

option = int(input("What would you like to do [1,2,3,4]? "))

*这是我使用打印菜单重复代码的部分 * 

if option ==1:
   print("In command 1 - encrypt string \n")
   string = input("Please enter string to encrypt: ")
   offsetvalue = int(input("Please enter positive offset value: "))
    print("")

while offsetvalue > 26 or offsetvalue < 1:
      offsetvalue = int(input("Please enter a positive offset value between 1 - 26: "))
      Encryption = ""

for letter in string:
    encryption_num = ord(letter)
      encryption_num += offsetvalue

**# Loops the ASCII value**
if encryption_num > 126:
        encryption_num -= 94
        # adds it to the total string
        encryption_num = chr(encryption_num)
        Encryption += encryption_num
        # encrypted string to the screen
        print("\nEncrypted string:")
        print(Encryption)

elif option == 2:

        # prompts the user to input
        print("In command 2 - decrypt string \n")
        string = input("Please enter string to decrypt: ")
        offsetvalue = int(input("Please enter negative offset value: "))
        print("")

while offsetvalue < -26 or offsetvalue > -1:
      offsetvalue = int(input("Please enter negative offset value between -1 - -26: "))

    Decryption = ""

for letter in string:
    decryption_num = ord(letter)
    decryption_num += offsetvalue
         if decryption_num < 32:
            decryption_num += 94
            decryption_num = chr(decryption_num)
            Decryption += decryption_num

            print("\nDecrypted string:")
            print(Decryption)

问题似乎在这里

elif option == 3:
     print("in command 3 -brute force \n")
     string = input("please enter string to decrypt: ")
     offsetvalue = -0
     while offsetvalue != -26:
     decryption_num = 0
     Decryption = ""

 while Decryption < len(letter):
      c = ord(string[decryption_num]) + offsetvalue
      if c < 0:
      c += 128
      decryption_num = chr(c)
      Decryption += decryption_str
      decryption_num += 1
      offsetvalue -= 1
      print ("\noffset", offsetvalue, "=Decrypted string:", Decryption)


    option = int(input("What would you like to do [1,2,3,4]? "))

#input error
elif option == 4:
        print ("\nGoodbye")

我尽力确定问题出在哪里，任何帮助将不胜感激......

4

1 回答 1

2

这没有多大意义：

elif option == 3:
        print("in command 3 -brute force \n")
        string = input("please enter string to decrypt: ")
        offsetvalue = -0
    while offsetvalue != -26:

它是这个

elif option == 3:
        print("in command 3 -brute force \n")
        string = input("please enter string to decrypt: ")
        offsetvalue = -0
        while offsetvalue != -26:

或者那个

elif option == 3:
        print("in command 3 -brute force \n")
        string = input("please enter string to decrypt: ")
        offsetvalue = -0
while offsetvalue != -26:
于 2013-05-05T16:15:12.740 回答