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diff --git a/src/Simplex_tree/example/block.cpp b/src/Simplex_tree/example/block.cpp
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+/*    This file is part of the Gudhi Library. The Gudhi library
+ *    (Geometric Understanding in Higher Dimensions) is a generic C++
+ *    library for computational topology.
+ *
+ *    Author(s):       Vincent Rouvreau
+ *
+ *    Copyright (C) 2014
+ *
+ *    This program is free software: you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation, either version 3 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <gudhi/graph_simplicial_complex.h>
+#include <gudhi/Simplex_tree.h>
+
+#include <iostream>
+#include <utility>  // for pair
+#include <vector>
+
+using Simplex_tree = Gudhi::Simplex_tree<>;
+using Vertex_handle = Simplex_tree::Vertex_handle;
+using Filtration_value = Simplex_tree::Filtration_value;
+using typeVectorVertex = std::vector< Vertex_handle >;
+using typePairSimplexBool = std::pair< Simplex_tree::Simplex_handle, bool >;
+
+int main(int argc, char * const argv[]) {
+
+  // Construct the Simplex Tree
+  Simplex_tree simplexTree;
+
+  simplexTree.insert_simplex({0, 1});
+  simplexTree.insert_simplex({0, 2});
+  simplexTree.insert_simplex({0, 3});
+  simplexTree.insert_simplex({1, 2});
+  simplexTree.insert_simplex({1, 3});
+  simplexTree.insert_simplex({2, 3});
+  simplexTree.insert_simplex({2, 4});
+  simplexTree.insert_simplex({3, 6});
+  simplexTree.insert_simplex({4, 5});
+  simplexTree.insert_simplex({4, 6});
+  simplexTree.insert_simplex({5, 6});
+  simplexTree.insert_simplex({6});
+
+  std::cout << "********************************************************************\n";
+  // Display the Simplex_tree - Can not be done in the middle of 2 inserts
+  std::cout << "* The complex contains " << simplexTree.num_simplices() << " simplices\n";
+  std::cout << "   - dimension " << simplexTree.dimension() << "   - filtration " << simplexTree.filtration() << "\n";
+  std::cout << "* Iterator on Simplices in the filtration, with [filtration value]:\n";
+  for (auto f_simplex : simplexTree.filtration_simplex_range()) {
+    std::cout << "   " << "[" << simplexTree.filtration(f_simplex) << "] ";
+    for (auto vertex : simplexTree.simplex_vertex_range(f_simplex))
+      std::cout << "(" << vertex << ")";
+    std::cout << std::endl;
+  }
+
+  simplexTree.expansion_with_blockers(3, [](){return true;});
+
+  simplexTree.initialize_filtration();
+  std::cout << "********************************************************************\n";
+  // Display the Simplex_tree - Can not be done in the middle of 2 inserts
+  std::cout << "* The complex contains " << simplexTree.num_simplices() << " simplices\n";
+  std::cout << "   - dimension " << simplexTree.dimension() << "   - filtration " << simplexTree.filtration() << "\n";
+  std::cout << "* Iterator on Simplices in the filtration, with [filtration value]:\n";
+  for (auto f_simplex : simplexTree.filtration_simplex_range()) {
+    std::cout << "   " << "[" << simplexTree.filtration(f_simplex) << "] ";
+    for (auto vertex : simplexTree.simplex_vertex_range(f_simplex))
+      std::cout << "(" << vertex << ")";
+    std::cout << std::endl;
+  }
+
+  return 0;
+}