#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <iostream.h>

int main(int argc, char *argv[])
{
   int  fd;
   char line[100];
   int  n;
   int  pos;

   fd = open("textFile", O_RDONLY);

   n = read(fd, &line[0], 10);
   line[n] = '\0';
   cout << "Data read = `" << line << "'" << endl;

   pos = lseek(fd, 2, SEEK_SET);
   cout << "New position = " << pos << endl;

   n = read(fd, &line[0], 10);
   line[n] = '\0';
   cout << "Data read = `" << line << "'" << endl;

   pos = lseek(fd, -20, SEEK_END);
   cout << "New position = " << pos << endl;

   n = read(fd, &line[0], 10);
   line[n] = '\0';
   cout << "Data read = `" << line << "'" << endl;

}