string-izbaci n-tu rijec

#include <stdio.h>
#include <string.h>


void IzbaciRijec (char *s, int n)  {
    while ((*s<'a' && *s>'Z') || (*s<'A' && *s>'z'))
        s++;
    int i=0, k=0, br_rijeci=0;
    while (*(s+i)!='\0') {
            if (((*(s+i)<'a' && *(s+i)>'Z') || (*(s+i)<'A' || *(s+i)>'z'))
            && ((*(s+i+1)>='a' && *(s+i+1)<='z') || (*(s+i+1)>='A' && *(s+i+1)<='Z') || *(s+i+1)=='\0'))
           {
            i++;
            k++;
        if (++br_rijeci==n) {
                do {
                        *(s+i-k)=*(s+i);
                s++;
                }
                while (*(s+i-k)!='\0');
                *(s+i-k)!='\0';
                break;
        }
        k=0;
    }
    i++;
    k++;
}
}

int main () {
    printf("Unesite jednu recenicu sa maks. 100 znakova: ");
    char recenica[100],c;
    int i=0,n;
    do {
            c=getchar();
            recenica[i]=c;
            i++;
    } while (c!='\n' && i<100);
    recenica[i-1]='\0';
    printf("Unesite redni broj rijeci koju zelite izbaciti: ");
    scanf("%d",&n);
    IzbaciRijec(recenica,n);
    printf("\nNova recenica glasi: %s",recenica);
    return 0;
}