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diff --git a/src/Persistence_representations/example/betti_sequence.cpp b/src/Persistence_representations/example/betti_sequence.cpp
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+++ b/src/Persistence_representations/example/betti_sequence.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):       Mathieu Carriere
+ *
+ *    Copyright (C) 2018  INRIA (France)
+ *
+ *    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/Betti_sequence.h>
+
+#include <iostream>
+#include <vector>
+#include <utility>
+
+using Persistence_diagram = Gudhi::Persistence_representations::Persistence_diagram;
+using BS = Gudhi::Persistence_representations::Betti_sequence;
+
+int main(int argc, char** argv) {
+
+  Persistence_diagram persistence;
+
+  persistence.push_back(std::make_pair(1, 2));
+  persistence.push_back(std::make_pair(6, 8));
+  persistence.push_back(std::make_pair(0, 4));
+  persistence.push_back(std::make_pair(3, 8));
+
+  double min_x = 0; double max_x = 8; int res_x = 1000;
+
+  BS bs(persistence, min_x, max_x, res_x);
+  std::vector<int> B = bs.vectorize();
+
+  for(int i = 0; i < res_x; i++)  std::cout << B[i] << ", ";
+
+  return 0;
+}