#include <stdio.h>
#include <stdlib.h>
int compare(const void *a, const void *b) {
  const int *ia = a;
  const int *ib = b;
  return *ia - *ib;
}
int main() {
  int size = 10;
  int* list = NULL;
  char readbuf[10];
  while (1) {
    size++;
    list = realloc(list, size * sizeof(int));
    // FEHLERBEHANDLUNG
    for (int i = 0; i < size; ++i) {
      list[i] = rand() % 10;
    }

    for (int i = 0; i < size; i++) {
      printf("%i ", list[i]);
    }
    printf("\n");
    qsort(list, size, sizeof(int), compare);

    for (int i = 0; i < size; i++) {
      printf("%i ", list[i]);
    }
    printf("\n");
    if (!fgets(readbuf, sizeof(readbuf), stdin)) {
      if (ferror(stdin)) {
        perror("fgets");
        exit(EXIT_FAILURE);
      } else {
        break;
      }
    }
  }

  free(list);
  fflush(stdout);
  // FEHLERBEHANDLUNG mit perror
}