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

#define BUFFER 1024

struct fill
{
    char *string;
    struct fill *next_string
    }*start = NULL,
  *list;

void error(int num)
{
    switch(num)
    {
        case 1:
            printf("Not enough space in buffer\n");
            break;
        case 2:
            printf ("Memory allocation error\n");
            break;
    }
    exit(1);
}

void input(char c,char *buf)
{
    int i=0;
    while ((c = getchar()) != EOF)
    {
        if (((c == ' ') || (c == '\n')) && (i != 0))
        {
            buf[i]='\0';
            break;
        }
                else
        {
        if  ( ( ( c >= 'a' && c <= 'z' ) )  ||
                ( c >= 'A'  && c <= 'Z' ) )
        {
            buf[i]=c;
            i++;
        }
        }
    }
    buf[i]='\0';
}

char *creat_din(char *mas,char *buf)
{
    int n = strlen(buf);
    mas = (char *)malloc((n+1)*sizeof(char));
    if (mas == NULL) error(2);
    strcpy(mas, buf);
    return mas;
}

struct fill *use_struct (struct fill *list,char *mas)
{

    list = (struct fill*)malloc(sizeof(struct fill));
    if (list == NULL) error(2);
    list->string = mas;
    list->next_string = start;
    start = list;
    printf("%s\n",list->string);
    return list;
}

void entry(struct fill *start, FILE *mine)
{
    while (start!=NULL)
    {
        fputs(start->string, mine);
        fputc('\n', mine);
        free(start);
        start=start->next_string;
    }
}

int main(/*int argc, char *argv[]*/)
{
    FILE *mine;
    char c, buf[BUFFER];
    char *mas;
    struct fill *rofl;

   // if (argc == 2)
  //  {
   //     printf("Invalid input data, try again");
   //     exit(2);
  //  }

   // if ((mine = fopen(argv[1], "w")) == NULL)
    //      perror(argv[1]);

    printf("Enter strings\n");
    do
    {
        input(c,buf);
        if (buf[0] != '\0')
        {
        mas = creat_din(mas,buf);
        list = use_struct(list, mas);
        }
    }
    while (*buf != '\0');
    for (rofl = start ;rofl!=NULL;rofl=rofl->next_string)
    {
        printf("string %s\n",rofl->string);
    }


    //entry(start, mine);
    //fclose(mine);
    return 0;
}