OR-Usmeni-Najveci Br U Stringu

#include <stdio.h>

int NajveciBroj (char *s) {
    int i, nb=0, max_broj=0;
    while (*s!='\0') {
            if (*s>='0' && *s<='9') {
                    nb=nb*10+(*s-'0');
            s++;
            while (*s>='0' && *s<='9') {
                    nb=nb*10+(*s-'0');
            s++;
            }
            if (nb>max_broj) {
                    max_broj=nb;
            }
            nb=0;
            }
            else {
                s++;
            }
    }
    return max_broj;
}
int main () {
    char s[]="123ab45CD678E9";
    printf("%d", NajveciBroj(s));
    return 0;
}