Question

我看到某人的Ceaser密码问题，并尝试编写自己的密码。我完成了所有工作，除了我的字母需要环绕

#User input
user_message = input("Input the text you would like encrypted (no 
characters)")

#Cipher function
def Ciphertext(message):
     cipher = ""
     for i in message:
#takes each letter in message
        number_code = ord(i) + 3
        letter_code = chr(number_code)
    cipher = cipher + letter_code
return cipher

#Unencrypted function
def Plaintext(cipher):
     text = ""
     #loops to get each number
     for i in cipher:
     #takes each letter in cipher
         unencrypted_code = ord(i) - 3
         unencrypted_letter_code = chr(unencrypted_code)
         text =  text + unencrypted_letter_code
    print(text)
#Prints
print("Encrypted message")
print(Ciphertext(user_message))
print("Unencrypted message")
Plaintext(Ciphertext(user_message))

好，所以我将代码更改为：＃用户输入 user_message = input（“输入您要加密的文本（否个字符）”）

#Cipher function
def Ciphertext(message):
    cipher = ""
    for i in message:
    #takes each letter in message then coverts it to number subtracts the 
diffrence then converts it back into characters
        number_code = ord(i) + 3
        letter_code = chr(number_code)
        if number_code >= ord("z"):
            number_code = number_code - 123
            number_code = number_code + ord("a")
            letter_code = chr(number_code)
        cipher = cipher + letter_code
    return cipher

cipher = Ciphertext(user_message)

#Unencrypted function
def Plaintext():
    text = ""
    #loops to get each number
    for i in cipher:
    #takes each letter in cipher
        unencrypted_code = ord(i) - 3
        if unencrypted_code >= ord("z"):
            unencryted_code = unencrypted_code + 26
        unencrypted_letter_code = chr(unencrypted_code)
        text =  text + unencrypted_letter_code
    print(text)
#Prints
print("Encrypted message")
print(Ciphertext(user_message))
print("Unencrypted message")
Plaintext()

但是它继续运行：^ _`，当它输入xyz

Answer 1

取模运算符％返回两个数字除法的余数，本质上是“包装”一个值。

您可以使用此行为来包装密码。请注意，如果您使用的是libc.dylib，则将获得数字的ASCII表示-请注意，这对于大写和小写字母是不同的。例如，“ A”为65，而“ a”为97。如果计划密码保留字母的大小写，则需要根据大小写分别减去65和97，以正确使用模数。尝试这样的事情：

ord()

Try it here!

如何重复字母Ceaser密码

1 个答案: