diff --git a/Polyhedron/doc_tex/Polyhedron/main.tex b/Polyhedron/doc_tex/Polyhedron/main.tex
index ec8504db002..800510b54f7 100644
--- a/Polyhedron/doc_tex/Polyhedron/main.tex
+++ b/Polyhedron/doc_tex/Polyhedron/main.tex
@@ -170,7 +170,7 @@ component referred to by the halfedge \ccc{h} and not the polyhedral
 surface as a whole. This examples works only on the combinatorial
 level of a polyhedral surface. The next example adds the geometry.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_simple.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_simple.cpp}
 
 % +-------------------------------------------------------------+
 \subsection{Example with Geometry in Vertices}
@@ -188,7 +188,7 @@ the tip of \ccc{h}, and so on.  The output of the program will be
 ``\verb|1 0 0\n0 1 0\n0 0 1\n0 0 0\n|''.
 
 %\newpage
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_tetra.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_tetra.cpp}
 
 The polyhedron offers a point iterator for convenience. The above
 \texttt{for} loop simplifies to a single statement by using
@@ -228,7 +228,7 @@ and exact arithmetic. In our example a homogeneous representation with
 \texttt{int} coordinates is sufficient. The four plane equations of the
 tetrahedron are the output of the program.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_planes.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_planes.cpp}
 
 % +-------------------------------------------------------------+
 \subsection{Example with a Vector Instead of a List Representation}
@@ -271,7 +271,7 @@ requires some preconditions, such as valid incidences, to be fulfilled
 that only the polyhedron can guarantee.
 \end{ccAdvanced}
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_vector.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_vector.cpp}
 
 
 % +-------------------------------------------------------------+
@@ -294,7 +294,7 @@ facets. It can be stored, for example, in the vertex itself or in a
 hash-structure.  See also the following Section~\ref{sectionPolyIO} for 
 file I/O.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_off.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_off.cpp}
 
 % +-------------------------------------------------------------+
 \subsection{Example Using Euler Operators to Build a Cube}
@@ -331,7 +331,7 @@ are also marked in the program code.
 \end{ccHtmlOnly}
 
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_cube.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_cube.cpp}
 
 
 
@@ -546,7 +546,7 @@ structure design.
 Pulling all pieces together, the full example program illustrates how easy
 the color attribute can be accessed once it is defined.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_color.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_color.cpp}
 
 We come back to the first template parameter, \texttt{Refs}, of the
 wrapper classes. This parameter provides us with local types that
@@ -625,7 +625,7 @@ actually a hole whose vertex coordinates pinch the hole shut to form an
 edge. The example directory \texttt{examples/Polyhedron/} contains the 
 OFF files used here.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_subdiv.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_subdiv.cpp}
 
 % +------------------------------------------------------------------------+
 \subsection{Example Using the Incremental Builder and Modifier Mechanism}
@@ -655,7 +655,7 @@ its \ccc{operator()} with a reference to its internally used halfedge
 data structure. Thus, this member function in \ccc{Build_triangle} can 
 create the triangle in the halfedge data structure.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_incr_builder.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_incr_builder.cpp}
 
 % +--------------------------------------------------------+
 
diff --git a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_3.tex b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_3.tex
index 6974815d993..547b329dad4 100644
--- a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_3.tex
+++ b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_3.tex
@@ -770,7 +770,7 @@ automatically updated.
 This example program instantiates a polyhedron using the default
 traits class and creates a tetrahedron.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_simple.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_simple.cpp}
 
 \end{ccRefClass}
 
diff --git a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_incremental_builder_3.tex b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_incremental_builder_3.tex
index 7d419c739ca..969e8632271 100644
--- a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_incremental_builder_3.tex
+++ b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_incremental_builder_3.tex
@@ -200,7 +200,7 @@ section:
 A modifier class creates a new triangle in the halfedge data structure
 using the incremental builder.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_incr_builder.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_incr_builder.cpp}
 
 \end{ccRefClass}
 
diff --git a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_items_3.tex b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_items_3.tex
index 412a3d7af1b..00dffc20bac 100644
--- a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_items_3.tex
+++ b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_items_3.tex
@@ -79,7 +79,7 @@ access to the new member variable.
 See also the \ccc{PolyhedronItems_3} concept for another illustrative
 example.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_color.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_color.cpp}
 
 \end{ccRefClass}
 
diff --git a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_traits_3.tex b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_traits_3.tex
index aa5c3abf8e0..fefcdea7d1f 100644
--- a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_traits_3.tex
+++ b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_traits_3.tex
@@ -79,7 +79,7 @@ for testing sufficiency of requirements.
 Instantiation of a polyhedral surface with the 
 Cartesian kernel based on double coordinates. 
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_simple.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_simple.cpp}
 
 \end{ccRefClass}
 
diff --git a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_traits_with_normals_3.tex b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_traits_with_normals_3.tex
index 992c4f3a282..adcde83396e 100644
--- a/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_traits_with_normals_3.tex
+++ b/Polyhedron/doc_tex/Polyhedron_ref/Polyhedron_traits_with_normals_3.tex
@@ -71,7 +71,7 @@ normal vector and no plane equation for each facet. We compute the
 normal vector assuming exact arithmetic (integers in this example)
 and convex planar facets.
 
-\ccIncludeExampleCode{Polyhedron/polyhedron_prog_normals.C}
+\ccIncludeExampleCode{Polyhedron/polyhedron_prog_normals.cpp}
 
 \end{ccRefClass}
 
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_color.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_color.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_color.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_color.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_cube.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_cube.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_cube.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_cube.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_cut_cube.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_cut_cube.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_cut_cube.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_cut_cube.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_incr_builder.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_incr_builder.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_incr_builder.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_incr_builder.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_normals.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_normals.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_normals.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_normals.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_off.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_off.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_off.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_off.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_planes.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_planes.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_planes.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_planes.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_simple.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_simple.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_simple.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_simple.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_subdiv.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_subdiv.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_subdiv.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_subdiv.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_subdiv_with_boundary.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_subdiv_with_boundary.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_subdiv_with_boundary.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_subdiv_with_boundary.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_tetra.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_tetra.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_tetra.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_tetra.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_traits.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_traits.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_traits.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_traits.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_vector.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_vector.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_vector.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_vector.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_vertex_color.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_vertex_color.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_vertex_color.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_vertex_color.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_prog_vertex_normal.C b/Polyhedron/examples/Polyhedron/polyhedron_prog_vertex_normal.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_prog_vertex_normal.C
rename to Polyhedron/examples/Polyhedron/polyhedron_prog_vertex_normal.cpp
diff --git a/Polyhedron/examples/Polyhedron/polyhedron_self_intersection.C b/Polyhedron/examples/Polyhedron/polyhedron_self_intersection.cpp
similarity index 100%
rename from Polyhedron/examples/Polyhedron/polyhedron_self_intersection.C
rename to Polyhedron/examples/Polyhedron/polyhedron_self_intersection.cpp