Fix build when c++98 is enabled

modules/sensor/test/force-torque/testComedi.cpp

@@ -1,7 +1,7 @@
 /****************************************************************************
  *
  * ViSP, open source Visual Servoing Platform software.
- * Copyright (C) 2005 - 2023 by Inria. All rights reserved.
+ * Copyright (C) 2005 - 2024 by Inria. All rights reserved.
  *
  * This software is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -30,13 +30,12 @@
  *
  * Description:
  * Test force/torque ATI sensor.
- *
-*****************************************************************************/
+ */
 
 /*!
   \example testComedi.cpp
   This example shows how to retrieve data from a sensor connected to a DAQ
-  board. He we have 1 signe main threads that acquires physical values at 100
+  board. Here we have 1 single main threads that acquires physical values at 100
   Hz (10 ms) and records data in recorded-physical-data-sync.txt file.
 
 */
@@ -58,9 +57,11 @@ int main()
   vpPlot scope(1, 700, 700, 100, 200,
                std::string("ATI physical sensor data (") + comedi.getPhyDataUnits() + std::string(")"));
   scope.initGraph(0, comedi.getNChannel());
+#if (VISP_CXX_STANDARD >= VISP_CXX_STANDARD_11)
   for (unsigned int i = 0; i < comedi.getNChannel(); i++) {
     scope.setLegend(0, i, "G" + ((std::ostringstream() << i)).str());
   }
+#endif
 #endif
 
   std::string file("recorded-physical-data-sync.txt");