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>If I use C code to push a table
>on the top of stack.
>In Lua code, how to get the table.
>I know if I call a Lua function
>such as f(a), the a will be the table.
>But If I just want to use normal Lua code,
>is there any functions to get the table?

You must either set the table as the value of a global variable or of a table
field, or you must send it as one of the return values of a function that was
called from Lua.  See the implementation of the standard libraries for code
that send values to Lua.
--lhf