根据Robert B. Sledge的CB改编，主要改动是数据缓冲区的处理。原程序采用读写文件形式，对\r\n字符处理时看成是一个。

而在此程序中将其分开。另外在判断是否回车换行后，原程序使用peek变量保存这个状态，此程序改成将缓冲区字符指针倒退2个字符。

由于时间有限，暂时不对其进行完善了，如程序写作风格和功能等。

-According to Robert B. Sledge of CB adaptation, the major changes to deal with the data buffer. The original form of the procedure used to read and write files on the characters as a handle when. In this procedure will be separated. Also, determine whether the carriage return line feed after the original procedure using peek preserve the state variables, this procedure will change the character buffer pointer back two characters. Since time is limited, do not be perfected, such as procedures, such as writing style and function.