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='')
凯撒密码2
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转载自www.cnblogs.com/liangzhenyu/p/9113154.html
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