说明：  内容包括: 打开一个文件用于读或写,分析文件名,使用快速排序例程进行排序,向正在执行的程序发送一个信号,改变数据段空间位置,非局部转移,以指定频率打开PC扬声器 ,正切函数,转换一个无符号长整型数为字符串,送格式化输出到一流中 ,返回窗口内水平光标位置等
(include : open a file for reading or writing, analysis, and the use of rapid sorting routines for sorting, being implemented to send a signal change of location data, non- partial transfer, open to the designated frequency PC speakers tangent function, converting an unsigned long integer to a string, send formatted output to a first-class, the window to return to the level of the cursor position)