for example:

#include <stdlib.h>
#include <stdio.h>
#include <wiringPi.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "linux/init.h"

in Eclipse

<>   -----   compiler path file and workspace path file

""     -----   other path file  

Linux C/C++ --- “” and <> in the use of head include file