macro_concatenate.cpp

#define COMMAND(NAME)  { #NAME, NAME ## _command }
     
struct command commands[] =
{
 COMMAND (quit),
 COMMAND (help),
 ...
};

struct command
{
 char *name;
 void (*function) (void);
};

struct command commands[] =
{
 { "quit", quit_command },
 { "help", help_command },
 ...
};