1.7.4 #line
The #line
directive allows the current line number and the apparent name of the current sourcecode filename to be changed.
Syntax:
#line
line-number filename
Note that if the filename is not given, then it stays the same. The line number on the current line is one greater than the number of new-line characters (so the first line number is 1).
Examples:
#line 50 user.c
#line 23