diff --git a/kdtree/examples/kdtrees/example1.C b/kdtree/examples/kdtrees/example1.cpp
similarity index 100%
rename from kdtree/examples/kdtrees/example1.C
rename to kdtree/examples/kdtrees/example1.cpp
diff --git a/kdtree/examples/kdtrees/example2.C b/kdtree/examples/kdtrees/example2.cpp
similarity index 100%
rename from kdtree/examples/kdtrees/example2.C
rename to kdtree/examples/kdtrees/example2.cpp
diff --git a/kdtree/examples/kdtrees/example3.C b/kdtree/examples/kdtrees/example3.cpp
similarity index 100%
rename from kdtree/examples/kdtrees/example3.C
rename to kdtree/examples/kdtrees/example3.cpp
diff --git a/kdtree/examples/kdtrees/example4.C b/kdtree/examples/kdtrees/example4.cpp
similarity index 100%
rename from kdtree/examples/kdtrees/example4.C
rename to kdtree/examples/kdtrees/example4.cpp