Hi,

I want to write a parser program which will take commands typed by users and will parse it against a parse tree and if command is syntactically correct,will return a a pointer to a function which will functionally execute the command.

I can write a functions to collect the commands and break them separately and store them in an array.I need help in developing a parser function which will parse the command for syntax against a structure conatining the valid command syntax or something similar to that and should return a pointer to a function which will execute the command.The function pointer can also be a part of the parse tree structure.

A typical command would be like "add user" or "add group"
the parse structure would look something like one below.


so parser function will return function_pointer.

So the question is how to write a function that returns the pointer to another function and how to use this pointer to call another function?

Any help will be appriciated.

Thanks,