// Modify this file
// compile with: gcc linkedlist.c -o linkedlist

#include <stdio.h>
#include <stdlib.h>

typedef struct node {
        int data;
        struct node* next;
}node_t;

node_t* list;

void create_list() {

        system("./data.sh");
        node_t* head = (node_t*)malloc(sizeof(node_t));

        FILE * fp;
        char * line = NULL;
        size_t len = 0;
        ssize_t read;

        fp = fopen("data.txt", "r");
        if (fp == NULL)
            exit(EXIT_FAILURE);

        node_t* prev = head;
        node_t* current = NULL;
        while ((read = getline(&line, &len, fp)) != -1) {
            current = (node_t*)malloc(sizeof(node_t));
            current->data = atoi(line);
            current->next = NULL;
            prev->next = current;
            prev = current;
            current = NULL;
        }

        fclose(fp);
        if (line)
            free(line);

        list = head;

}

void print_list() {
        node_t* tmp = list;
        while(tmp != NULL) {
                printf("%d\n", tmp->data);
                tmp = tmp->next;
        }
}


void free_list() {
        node_t *tmp = list->next;
        node_t *freed = list;
        while(tmp != NULL) {
                free(freed);
                freed = tmp;
                tmp = tmp->next;
        }
        free(freed);
}


int main(){

        create_list();
        print_list();
        free_list();

        return 0;
}