// This is a second example of how you should create arrays.
// In particular, look at functions make_array and copy_array,
// and how they respectively create arrays x and result.
// Compare to bad_example2.cpp.

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


int * make_array(int length)
{
  // bad way
  // int x[2];

  // good way
  int * x = (int *) malloc(sizeof(int) * length);

  x[0] = 10;
  x[1] = 20;

  return x;
}


int * copy_array(int * source, int length)
{
  // bad way
  // int result[length];

  // good way
  int * result = (int *) malloc(sizeof(int) * length);

  int i;
  for (i = 0; i < length; i++)
  {
    result[i] = source[i];
  }

  return result;
}


int main()
{
  int * x = make_array(2);

  int * y = copy_array(x, 2);
  printf("x[0] = %d\n", x[0]);

  free(x);
  free(y);

  return 0;
}