main()
{
void (*lookup(const char *pcmd))(void);
void stolower(char *pstring);
char command[21];
while (1) {
printf("\nEnter Action ('Help' for help): ");
scanf(" %20[^\n]", command);
if (command[O] == '\0') {
continue;
}
stolower(command);
(*lookup(command))(); /* call selected action */
}
}
/* End of File */