Question

所以我试图制作一个包含加密的凯撒密码。到目前为止，我已经能够在这些方面取得成功，但我无法弄清楚我的代码如何使用较小的案例。例如，当您输入消息时（我们将使用密钥为1的HelLO），它将返回IFMMP。我遇到的问题是它不会将小写字母作为小写字母返回，而是作为大写字母返回。我想知道是否有人可以帮我解决我的问题。谢谢！ PS：这是python3的代码 ABCs =

[ “A”， “B”， “C”， “d”， “E”， “F”， “G”， “H”， “I”， “J”， “K”，“L ”， “M”， “N”， “O”， “P”， “Q”， “R”， “S”， “T”， “U”， “V”， “W”， “X”， “Y”， “Z”， “A”， “b”， “C”， “d”， “E”， “F”， “G”， “H”， “I”， “J”，“K ”， “升”， “M”， “N”， “O”， “p”， “q”， “R”， “S”， “T”， “U”， “v”， “W”， “X”， “Y”， “Z”]

ans= input("Do you wish to encrypt, decrypt or brute force?")


if ans== "encrypt":
  msg=input("Enter your message:")
  key=int(input("Enter the key number (1-26)"))

  uncodedmsg= list(msg)
  for i in range (0, len(uncodedmsg)):
    letter=uncodedmsg[i]
    if letter  not in ABCs:
      i+=1
    else:
      letter2= ABCs.index(letter)
      letter3= letter2+key
      uncodedmsg[i]= ABCs[letter3%26] 
  messageend="".join(uncodedmsg)
  print ("Your translated text is:" + messageend )

Answer 1

您的问题在这里：

uncodedmsg[i] = ABCs[letter3 % 26]

你采取上限和下限的模数，所以你的答案永远不会超过26，所以你永远不会得到小写。

你可以做的是用这样的东西分支UpperCase和LowerCase：

ABCs = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"]
abcs = ["a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"]

if letter.isupper():
    letter2 = ABCs.index(letter)
    letter3 = letter2 + key
    uncodedmsg[i] = ABCs[letter3 % 26]
if letter.islower():
    letter2 = abcs.index(letter)
    letter3 = letter2 + key
    uncodedmsg[i] = abcs[letter3 % 26]

Caeser Cipher Code，小写不起作用

1 个答案: