Rpcalc Main
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#Wrap on
{fH4}The Controlling Function{f}

In keeping with the spirit of this example, the controlling function is
kept to the bare minimum.  The only requirement is that it call
{fCode}yyparse{f} to start the process of parsing.

#Wrap off
#fCode
main ()
\{
  yyparse ();
\}
#f
#Wrap on

