A.12.4 File Inclusion
A control line of the form
# include <filename>
causes the replacement of that line by the entire contents of the file filename. The characters in the name filename must not include > or newline, and the effect is undefined if it contains any of ", ', \, or /*. The named file is searched for in a sequence of implementation-defined places.
Similarly, a control line of the form
- # include "filename"
searches first in association with the original source file (a deliberately implementation-dependent phrase), and if that search fails, then as in the first form. The effect of using ', \, or