OR-Najduza rijec u Stringu

#include <stdio.h>


int MaxDuzina (char *s) {
    int max_duz=0;
    char *p=s;
    while (*s!='\0') {
            if ((tolower(*s)>='a' && tolower(*s)<='z' && s==p) || (tolower(*s)>='a' && tolower(*s)<='z' && *(s-1)==' '))
            { char *poc=s;
            while (tolower(*s)>='a' && tolower(*s)<='z')
                s++;
                char *kraj=s;
            if ((kraj-poc)>max_duz) max_duz=kraj-poc;
            }
            else s++;
    }
    return max_duz;
}




    int main () {
    char s[]="Ovo je recenica. ";
     printf("Najduza rijec ima %d znakova.",MaxDuzina(s));
    return 0;
}