用Delphi写的一个简单的加密解密算法，具体为：输入一行字符串，从第n个字符开始，没间隔k个字符取出来，然后把剩下的字符加到取出来的后面，形成密文，然后再解密-with Delphi write a simple encryption and decryption algorithms, in particular : input string, n from the characters, not characters interval k taken out and then added