java

  public String toString(){
    String result = "\n";
    if(count != 0){
      if (count > 2){
        result += print(2, true, "");
      }
      result += tree[0]+"\n";
      if (count > 1){
        result += print(1, false, "");
      }
    }
    return result;
  }

  private String print(int root, boolean isRight, String indent) {
    String result = "";
    int left = root*2+1;
    int right = root*2+2;
    if (right < count){
      result += print(right, true, indent + (isRight ? "        " : " |      "));
    }
    result += indent;
    if (isRight) {
      result += " /";
    } else {
      result += " \\";
    }
    result += "----- "+tree[root]+"\n";
    if (left < count) {
      result += print(left, false, indent + (isRight ? " |      " : "        "));
    }
    return result;
  }