C++ '__FILE__' and '__LINE__

Q: What are '__FILE__' and '__LINE__'?

A: '__FILE__' and '__LINE__' are predefined macros and part of the C/C++ standard. During preprocessing, they are replaced respectively by a constant string holding the current file name and by a integer representing the current line number.

There are other preprocessor variables including:
'__DATE__' -> a string literal of the form "Mmm dd yyyy"

'__TIME__' -> a string literal of the form "hh:mm:ss"

'__TIMESTAMP__' -> a string literal of the form "Mmm dd yyyy hh:mm:ss"

'__FUNCTION__' -> a string literal which contains the function name (this is part of C99, the new C standard and not all C++ compilers support it)
 

补充：软件开发 , C++ ,

上一个：设计模式--6大原则--依赖倒置原则
下一个：使用DOS重定位技术执行isqlw(SQL查询分析器)