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diff --git a/src/Bottleneck/example/random_diagrams.cpp b/src/Bottleneck/example/random_diagrams.cpp
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+++ b/src/Bottleneck/example/random_diagrams.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):       Francois Godi
+ *
+ *    Copyright (C) 2015  INRIA Saclay (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/Graph_matching.h"
+#include <iostream>
+
+using namespace Gudhi::bottleneck;
+
+int main() {
+  int n = 100;
+  std::vector< std::pair<double, double> > v1, v2;
+  for (int i = 0; i < n; i++) {
+    int a = rand() % n;
+    v1.emplace_back(a, a + rand() % (n - a));
+    int b = rand() % n;
+    v2.emplace_back(b, b + rand() % (n - b));
+  }
+  // v1 and v2 are persistence diagrams containing each 100 randoms points.
+  double b = bottleneck_distance(v1, v2, 0);
+  std::cout << b << std::endl;
+}