Change this unique c++ example to use the updated C++ interface.  Command-line options now work!
Change this unique c++ example to use the updated C++ interface.  Command-line
options now work!

svn path=/trunk/; revision=4852

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot