how provoke algorithm? (c twine reversal)

working by programming talk hurdles i found online, i an algorithm shelter const bake * relapse pointer new bake *. i cruise i have it, nonetheless work morally i wonky things - fundamentally carrying comment null-terminating impression myself. somehow i feel wrong, nonetheless i'm stumped, i wondering someone assistance me out:

char * reverse(const bake * str)
{
  int length = strlen(str);
  bake * reversed_string = new char[length+1];

  for(int i = 0; i < length; ++i)
  {
    reversed_string[i] = str[(length-1) - i];
  }
  //need zero cancel string
  reversed_string[length] = '\0';

  relapse reversed_string;

}

int main(int argc, bake * argv[])
{

  bake * rev_str = reverse("testing");

  cout << "your twine vibrated this: " << rev_str << endl;

  mislay rev_str;
  rev_str = 0;

  relapse 0;
}