.s文件是干什么用的，如何阅读，有没相关的学习资料

谢谢各位

用记事本打开.s文件可以看到如下描述:

** This file is generated automatically based upon the options selected
** in the Startup Code Wizard. Changes to the startup configuration
** should be made by changing the appropriate options rather than
** editing this file. Additional user code to be executed before calling
** main can be inserted between the labels .start_of_user_code1 and
** .end_of_user_code1 or .start_of_user_code2 and .end_of_user_code2.
** This code is preserved if the CRT is re-generated.

你找找帮助文件里有没有介绍，一般这个文件不需要我们处理，自动生成，无需修改，所以没有关注过他的格式。