大写字母凯撒密码

Question

因此，目前我的凯撒密码程序运行良好，每当我使用小写字母。但是，当我用大写输入一个单词或短语时，我想让它工作。这是我现在有的代码。希望你们能帮我完成这件事。

def encrypt（消息，距离）：“”将获取消息并将其旋转到距离，以创建加密消息“”

encryption = ""
for ch in message:
    ordvalue = ord(ch)
    cipherValue = ordvalue + distance
    if cipherValue > ord("z"):
        cipherValue = ord("a") + distance - (ord("z") - ordvalue + 1)
    encryption += chr(cipherValue)
return encryption

def decrypt（消息，距离）：“”“将解密上面的消息”“”

decryption = ""
for cc in message:
    ordvalue = ord(cc)
    decryptValue = ordvalue - distance
    if decryptValue < ord("a"):
        decryptValue = ord("z") - distance - (ord("a") - ordvalue - 1)
    decryption += chr(decryptValue)
return decryption

def binaryConversion（消息）：“”“将把单词转换成二进制代码”“

binary = ""
for cb in message:
    binaryString = " " #Binary number
    binaryNumber = ord(cb)
    while binaryNumber > 0:
        binaryRemainder = binaryNumber % 2
        binaryNumber = binaryNumber // 2
        binaryString = str(binaryRemainder) + binaryString
    binary += binaryString
return binary

运行=真

#input 

message = input("Enter word to be encrypted: ") #original message
distance = int(input("Enter the distance value: ")) #distance letters will be moved

#variables

fancy = encrypt(message, distance)
boring = decrypt(fancy, distance)
numbers = binaryConversion(message)

#output
print("\n")
print("Your word was: ", format(message, ">20s"))
print("The distance you rotated was: ", format(distance), "\n")
print("The encryption is: ", format(fancy, ">16s"))
print("The decryption is: ", format(boring, ">16s"))
print("The binary code is: ", format(numbers)) #I know an error comes here but it will work in the end

repeat = input("Would you like to encrypt again? Y/N ")
print("\n")
if repeat == "N" or repeat == "n":
    run = False
else:
    run = True

Answer 1

我建议您以映射的心态而不是偏移的心态来解决这个问题。您可以基于偏移量构建映射，但如果使用字典或其他形式的一对一映射，字符处理将更容易。

例如：

  offset = 5
  source = "abcdefghijklmnopqrstuvwxyz"
  target = source[offset:]+source[:offset]
  source = source + source.upper()
  target = target + target.upper()
  encrypt = str.maketrans(source,target)
  decrypt = str.maketrans(target,source)

  e = "The quick brown Fox jumped over the lazy Dogs".translate(encrypt)
  print(e)
  d = e.translate(decrypt)
  print(d)