// parse the command line, return 0 if ok, -1 if "-h" or "--help" option
// was encountered and the help message was given or a positive value if a
// syntax error occured
- int Parse();
+ //
+ // if showUsage is true, Usage() is called in case of syntax error or if
+ // help was requested
+ int Parse(bool showUsage = TRUE);
// give the usage message describing all program options
void Usage();