Homework

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define N 10

typedef struct list
{
    char *s;
    struct list *next;
} list;


list * add_node(list *node, char *stringNew)
{
    list *newNode;
    if (node == NULL)
    {
        newNode = malloc(sizeof(list));
        newNode->s = stringNew;
        newNode->next = NULL;
        node = newNode;
        return newNode;
    }
    else
    {
        if (strcmp(stringNew, node->s) > 0)
        {
            node->next = add_node(node->next, stringNew);
        }
        else
        {
            newNode = malloc(sizeof(list));
            newNode->s = stringNew;
            newNode->next = node;
            node = newNode;
            return newNode;
        }
    }
    return node;
}

void print_list (list *node)
{
    while (node != NULL)
    {
        printf("%s\n", node->s);
        node = node->next;
    }
}

char* input_str(int *status)
{
    char symb, *str;
    int lenStr = 0, borderFlag = N;
    str = malloc(N);
    symb = getchar();
    while (symb != '.')
    {
        if (symb != '\n')
        {
            if (lenStr == borderFlag - 1)
            {
                borderFlag = borderFlag + N;
                if (malloc(borderFlag) == NULL)
                {
                    printf("You don't have enough memory\n");
                    exit(0);
                }
                str = realloc(str, borderFlag);
            }
            str[lenStr] = symb;
            lenStr++;
        }
        else
        {
            str[lenStr] = '\0';
            return str;
        }
        symb = getchar();
    }
    *status = 1;
    return NULL;
}

list * free_list(list *spisok)
{
    list *nextNode;
    while (spisok != NULL)
    {
        free(spisok->s);
        nextNode = spisok->next;
        free(spisok);
        spisok = nextNode;
    }
    return spisok;
}



int main(void)
{
    int status = 0;
    char *string = NULL;
    list *spisok = NULL;
    int userRespond = 1;
    while (userRespond == 1)
    {
        while (status == 0)
        {
            string = input_str(&status);
            if (status == 0)
            {
                spisok = add_node(spisok, string);
            }
        }
        print_list(spisok);
        printf("Do you want to create a new list?\n");
        printf("0/1\n");
        scanf("%d", &userRespond);
        if (userRespond == 1)
        {
            spisok = free_list(spisok);
            free(spisok);
            status = 0;
            spisok = NULL;
        }


    }
    return 0;
}