mathdatech/Python
1
0
Fork 0
mirror of https://github.com/TheAlgorithms/Python.git synced 2025-01-31 14:43:43 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #46 from Henocks/patch-2

Browse Source 
Slight Performance/Visual Update
This commit is contained in:
Harshil 2016-11-09 19:55:27 +05:30 committed by GitHub
commit 3f505c5b39
1 changed files with 11 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
ciphers/caesar_cipher.py
View File

@ -2,8 +2,8 @@
def main(): def main():
message = input("Enter message: ") message = input("Enter message: ")
key = int(input("Key [1-26]: ")) key = int(input("Key [1-26]: "))
mode = input("Encrypt or Decrypt [e/d]: ") mode = input("Encrypt or Decrypt [e/d]: ")
if mode.lower().startswith('e'): if mode.lower().startswith('e'):
mode = "encrypt" mode = "encrypt"
@ -11,38 +11,31 @@ def main():
mode = "decrypt" mode = "decrypt"
translated = encdec(message, key, mode) translated = encdec(message, key, mode)
if mode == "encrypt": if mode == "encrypt":
print("Encryption:", translated) print("Encryption:", translated)
elif mode == "decrypt": elif mode == "decrypt":
print("Decryption:", translated) print("Decryption:", translated)
def encdec(message, key, mode): def encdec(message, key, mode):
""" message = message.upper()
>>> encdec('Harshil Darji', 12, 'encrypt')
'TMDETUX PMDVU'
>>> encdec('TMDETUX PMDVU', 12, 'decrypt')
'HARSHIL DARJI'
"""
message = message.upper()
translated = "" translated = ""
LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
for symbol in message: for symbol in message:
if symbol in LETTERS: if symbol in LETTERS:
num = LETTERS.find(symbol) num = LETTERS.find(symbol)
if mode == "encrypt": if mode == "encrypt":
num = num + key num = num + key
elif mode == "decrypt": elif mode == "decrypt":
num = num - key num = num - key
if num >= len(LETTERS): if num >= len(LETTERS):
num = num - len(LETTERS) num -= len(LETTERS)
elif num < 0: elif num < 0:
num = num + len(LETTERS) num += len(LETTERS)
translated = translated + LETTERS[num] translated += LETTERS[num]
else: else:
translated = translated + symbol translated += symbol
return translated return translated
if __name__ == '__main__': if __name__ == '__main__':