writeJoin.C

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/*
                          Aleph_w
 
  Data structures & Algorithms
  version 2.0.0b
  https://github.com/lrleon/Aleph-w
 
  This file is part of Aleph-w library
 
  Copyright (c) 2002-2026 Leandro Rabindranath Leon
 
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
 
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
 
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.
*/
 
 
# include <iostream>
# include <fstream>
# include <tclap/CmdLine.h>
# include <aleph.H>
# include <tpl_binNodeUtils.H>
# include <tpl_binNodeXt.H>
 
# include <cstdlib>
# include <cassert>
using namespace Aleph;
# include <cstdlib>
# include <cassert>
using namespace std;
 
typedef BinNode<int> Node;
 
// Output streams for the three trees
ofstream output;
ofstream output1;
ofstream output2;
 
void print_key(Node * p, int, int)
{
  output << p->get_key() << " ";
}
 
void print_key1(Node * p, int, int)
{
  output1 << p->get_key() << " ";
}
 
void print_key2(Node * p, int, int)
{
  output2 << p->get_key() << " ";
}
 
int main(int argc, char* argv[])
{
  try
    {
      TCLAP::CmdLine cmd(
        "Demonstrate BST join operation.\n"
        "Creates two BSTs and joins them into one, generating visualization files.",
        ' ', "1.0");
 
      TCLAP::ValueArg<int> nArg("n", "count",
                                 "Number of elements per tree (total = 2n)",
                                 false, 10, "int");
      cmd.add(nArg);
 
      TCLAP::ValueArg<unsigned int> seedArg("s", "seed",
                                             "Random seed (0 = use time)",
                                             false, 0, "unsigned int");
      cmd.add(seedArg);
 
      cmd.parse(argc, argv);
 
      int n = nArg.getValue();
      unsigned int t = seedArg.getValue();
 
      if (t == 0)
        t = time(nullptr);
 
      srand(t);
 
      cout << "=== BST Join Operation Demo ===" << endl;
      cout << "Elements per tree: " << n << ", Seed: " << t << endl << endl;
 
      // Open output files
      output.open("join-aux.Tree", ios::out);
      output1.open("join-1-aux.Tree", ios::out);
      output2.open("join-2-aux.Tree", ios::out);
 
      if (!output.is_open() || !output1.is_open() || !output2.is_open())
        {
          cerr << "Error: cannot open output files" << endl;
          return 1;
        }
 
      // Build first tree with n elements
      int value;
      Node* root1 = Node::NullPtr;
 
      cout << "Building first tree with " << n << " elements..." << endl;
      for (int i = 0; i < n; i++)
        {
          while (true)
            {
              value = rand() % (n * 100) + 1;
              if (searchInBinTree(root1, value) == nullptr)
                break;
            }
          Node* p = new Node(value);
          insert_root(root1, p);
        }
 
      assert(check_bst(root1));
      int n1 = preOrderRec(root1, &print_key1);
      output1 << endl;
      
      cout << "  Nodes: " << n1 
           << ", Height: " << computeHeightRec(root1) << endl;
 
      // Build second tree with n elements (non-overlapping keys)
      Node* root2 = Node::NullPtr;
 
      cout << "Building second tree with " << n << " elements..." << endl;
      for (int i = 0; i < n; i++)
        {
          while (true)
            {
              value = rand() % (n * 100) + 1;
              if (searchInBinTree(root1, value) == nullptr &&
                  searchInBinTree(root2, value) == nullptr)
                break;
            }
          Node* p = new Node(value);
          insert_in_bst(root2, p);
        }
 
      assert(check_bst(root2));
      int n2 = preOrderRec(root2, &print_key2);
      output2 << endl;
      
      cout << "  Nodes: " << n2 
           << ", Height: " << computeHeightRec(root2) << endl;
 
      // Join the two trees
      cout << endl << "Joining trees..." << endl;
      Node* dup = nullptr;
      Node* root = join(root1, root2, dup);
 
      if (dup != nullptr)
        {
          cout << "Warning: duplicates found (unexpected)" << endl;
        }
 
      assert(check_bst(root));
      int n_total = preOrderRec(root, &print_key);
      output << endl;
      
      cout << "Resulting tree:" << endl;
      cout << "  Nodes: " << n_total 
           << ", Height: " << computeHeightRec(root) << endl;
 
      // Clean up
      output.close();
      output1.close();
      output2.close();
      destroyRec(root);
 
      cout << endl << "Generated files:" << endl;
      cout << "  - join-1-aux.Tree (first tree)" << endl;
      cout << "  - join-2-aux.Tree (second tree)" << endl;
      cout << "  - join-aux.Tree (joined result)" << endl;
    }
  catch (TCLAP::ArgException& e)
    {
      cerr << "Error: " << e.error() << " for arg " << e.argId() << endl;
      return 1;
    }
 
  return 0;
}