[srawls]

hmm ... from memory: (i'm shortening function name to f)

apstring f (apstring *letter, Tree* T, apstring *path_so_far) {
  apstring temp;
  if (T->Left == NULL) { //T is a leaf 
    if (T->data == letter)  
      return path_so_far;
    return "";
  }

  temp = f(letter,T->left,path_so_far + "0");
  if (temp == "")
    return f(letter,T->right,path_so_far + "1");
  return temp;
}

Stephen