fix borken link to ping-pong

diff --git a/examples/s4u/README.doc b/examples/s4u/README.doc
index 96691c5..78254fb 100644 (file)
--- a/examples/s4u/README.doc
+++ b/examples/s4u/README.doc
@@ -25,7 +25,7 @@ documentation, but it should remain readable directly.
     @ref examples/s4u/actor-create/s4u-actor-create_d.xml \n
     Shows how to start your actors to populate your simulation.
 
-  - <b>Ping Pong</b>: @ref examples/s4u/app-pingpong/s4u-app-pingpong.c\n
+  - <b>Ping Pong</b>: @ref examples/s4u/app-pingpong/s4u-app-pingpong.cpp\n
     This simple example just sends one message back and forth.
     The tesh file laying in the directory show how to start the simulator binary, highlighting how to pass options to 
     the simulators (as detailed in Section \ref options).