dva manje poznata trika.
// Challenge #1 by Leon Juranic
#include <stdio.h>
#include <fcntl.h>
#include <sys/types.h>
int buf[6]={0x41414141};
int fub[6]={0x41414141};
main (int argc, char **argv)
{
int fd;
long x, b = atoi(argv[2]);
if ((fd = open(argv[1],O_RDONLY)) == -1)
exit(-1);
x = read (fd,buf,sizeof(buf));
if (x>0) x/=4;
printf ("%s\n",buf);
buf[x] = b;
}