1 files changed, 4 insertions, 11 deletions
diff --git a/src/Persistent_cohomology/example/alpha_complex_3d_persistence.cpp b/src/Persistent_cohomology/example/alpha_complex_3d_persistence.cpp
index ac208957..f81951ce 100644
--- a/src/Persistent_cohomology/example/alpha_complex_3d_persistence.cpp
+++ b/src/Persistent_cohomology/example/alpha_complex_3d_persistence.cpp
@@ -39,9 +39,6 @@
 #include <list>
 #include <vector>
 
-using namespace Gudhi;
-using namespace Gudhi::persistent_cohomology;
-
 // Alpha_shape_3 templates type definitions
 typedef CGAL::Exact_predicates_inexact_constructions_kernel Kernel;
 typedef CGAL::Alpha_shape_vertex_base_3<Kernel> Vb;
@@ -66,11 +63,12 @@ typedef Alpha_shape_3::Edge Edge_3;
 typedef std::list<Alpha_shape_3::Vertex_handle> Vertex_list;
 
 // gudhi type definition
-typedef Simplex_tree<Simplex_tree_options_fast_persistence> ST;
+typedef Gudhi::Simplex_tree<Gudhi::Simplex_tree_options_fast_persistence> ST;
 typedef ST::Vertex_handle Simplex_tree_vertex;
 typedef std::map<Alpha_shape_3::Vertex_handle, Simplex_tree_vertex > Alpha_shape_simplex_tree_map;
 typedef std::pair<Alpha_shape_3::Vertex_handle, Simplex_tree_vertex> Alpha_shape_simplex_tree_pair;
 typedef std::vector< Simplex_tree_vertex > Simplex_tree_vector_vertex;
+typedef Gudhi::persistent_cohomology::Persistent_cohomology< ST, Gudhi::persistent_cohomology::Field_Zp > PCOH;
 
 Vertex_list from(const Cell_handle& ch) {
   Vertex_list the_list;
@@ -131,12 +129,7 @@ int main(int argc, char * const argv[]) {
     usage(argv[0]);
   }
 
-  int coeff_field_characteristic = 0;
-  int returnedScanValue = sscanf(argv[2], "%d", &coeff_field_characteristic);
-  if ((returnedScanValue == EOF) || (coeff_field_characteristic <= 0)) {
-    std::cerr << "Error: " << argv[2] << " is not correct\n";
-    usage(argv[0]);
-  }
+  int coeff_field_characteristic = atoi(argv[2]);
 
   Filtration_value min_persistence = 0.0;
   returnedScanValue = sscanf(argv[3], "%lf", &min_persistence);
@@ -282,7 +275,7 @@ int main(int argc, char * const argv[]) {
 
   std::cout << "Simplex_tree dim: " << simplex_tree.dimension() << std::endl;
   // Compute the persistence diagram of the complex
-  Persistent_cohomology< ST, Field_Zp > pcoh(simplex_tree);
+  PCOH pcoh(simplex_tree);
   // initializes the coefficient field for homology
   pcoh.init_coefficients(coeff_field_characteristic);