[cs631apue] questions about openmax.c

[zding4]

Hi everyone:

Sorry if you guys think this may be a trivial question
When I read the source code of openmax.c
It defines a static int variable openmax

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#ifdef OPEN_MAX
	static int openmax = OPEN_MAX;
#else
	static int openmax = 0;
#endif
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Why is it the "static int"?