sleep function in c, unix

What do i need to import to use the sleep function in unix? i know it's windows.h for windows, but what abou开发者_Go百科t unix?

It should be in unistd.h.

Please note that this gives you only a precision of integral seconds.

The most portable way for sub-second precision should be (ab-)using select().

#include <unistd.h>

• http://pubs.opengroup.org/onlinepubs/009695399/functions/sleep.html

#include <unistd.h>

THe man pages http://cis.kutztown.edu/~frye/cgi-bin/unixManPages.cgi?sleep+3C