凯撒密码2 

fr = open('letter.txt',mode='r',encoding='utf-8')
plaincode = fr.read()
print('明文:' + plaincode)

print('密文:',end='')
for c in plaincode:
    print(chr(ord(c)+3),end='')

posted on 2018-05-30 20:33  八达岭  阅读(468)  评论(0)    收藏  举报