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

int main()
{
    char **data = NULL;
    unsigned dataSize = 0;
    while(1){
        char buffer[256] = { 0 };
        printf("Enter string: ");
        scanf("%255[^\n]", buffer);
        getchar();
        data = realloc(data, (++dataSize)*sizeof(char *));
        data[dataSize-1] = calloc(strlen(buffer)+1, 1);
        strcpy(data[dataSize-1], buffer);
        if (strcmp(buffer, "0") == 0){
            break;
        }
    }

   for(int i = 0; i < dataSize; ++i){
    if (strlen(data[i]) > 0)
        printf("[%d] -> %s\n", i, data[i]);
    else
        printf("[%d] empty\n", i);
   }
   for(int i = 0; i < dataSize; ++i){
        free(data[i]);
   }
   free(data);

   return 0;
}