#include<stdio.h>
#define BYTESIZE 8
#define INTSIZE (sizeof(int)*BYTESIZE) /* vrne 4*8 ?*/
#define NUMDIGITS (INTSIZE/3 + (INTSIZE%3 != 0)) /*v oktalni abecedi 8 crk-osmisko, maskiramo zadnja tri mesta */
#define MASK 7  /*00000111*/

void octal(num)
unsigned num;
{
    int nonzero, d, msdigit;
    nonzero=0;
    for (d=NUMDIGITS-1; d>=0; d--)
    {
        msdigit=num>> d*3&MASK;  /*num premaknemo za*/
        nonzero=nonzero||msdigit;
        if(nonzero) putchar(msdigit+'0');
     }
    if(!nonzero) putchar('0');
}

main()
{
    printf("Intsize %u\n" , INTSIZE);
    printf("Numdigits %u\n" , NUMDIGITS);
    printf("Izpisujem osmisko 11: ");
    octal((unsigned)11);
    printf("\n");
}