add new example

SMDS_3/examples/SMDS_3/c3t3_example.cpp

@@ -0,0 +1,39 @@
+#include <CGAL/Exact_predicates_inexact_constructions_kernel.h>
+
+#include <CGAL/Simplicial_mesh_triangulation_3.h>
+#include <CGAL/Mesh_complex_3_in_triangulation_3.h>
+
+#include <CGAL/IO/File_medit.h>
+#include <fstream>
+
+using K = CGAL::Exact_predicates_inexact_constructions_kernel;
+
+using Triangulation = CGAL::Simplicial_mesh_triangulation_3<K>;
+using C3t3 = CGAL::Mesh_complex_3_in_triangulation_3<Triangulation>;
+
+int main(int argc, char* argv[])
+{
+  std::cout.precision(17);
+  std::cerr.precision(17);
+
+  std::string filename = (argc > 1) ? std::string(argv[1])
+                       : CGAL::data_file_path("meshes/elephant.mesh");
+
+  Triangulation tr;
+
+  std::ifstream is(filename, std::ios_base::in);
+  if(!CGAL::IO::read_MEDIT(is, tr))
+  {
+    std::cerr << "Failed to read" << std::endl;
+    return EXIT_FAILURE;
+  }
+
+  C3t3 c3t3;
+  c3t3.triangulation() = tr;
+
+  std::ofstream os("out.mesh");
+  CGAL::IO::write_MEDIT(os, tr, CGAL::parameters::all_vertices(true));
+  os.close();
+
+  return EXIT_SUCCESS;
+}