OR-postavke2-Filter

#include<stdio.h>
#include<math.h>

int Filter (char *s) {
    int br=0;
    while (*s!=0) {
            if (*s>='0' && *s<='9') {
                    br=br*10+(*s-'0');

            }
            s++;
    }
    return br;
}
int okreni (int n) {
    int nb=0;
    while (n!=0) {
            nb=nb*10+n%10;
            n/=10;
    }
    return nb;
}
int main () {
    char s[]="hrk45ljus21";
    int rez=Filter(s);
    printf("%d",okreni(rez));
    return 0;
}