C + + Call Lua Simple example

First of all configure the environment, Baidu Library this talk in detail

Http://wenku.baidu.com/view/7912da3667ec102de2bd8957.html

After the environment was configured, I also wrote a simple call

Main.cpp

#include <stdio.h>

extern "C" {

#include "Lua.h"

#include "Lualib.h"

#include "Lauxlib.h"

};

Lua_state *l;

int luaadd (int x, int y)

{

int sum;

Lua_getglobal (L, "add");

Lua_pushnumber (L, x);

Lua_pushnumber (L, y);

Lua_call (L, 2, 1);

sum = (int) lua_tonumber (L,-1);

Lua_pop (L, 1);

return sum;

}

int main (int argc, char *argv[])

{

int sum = 0;

L = Lua_open ();

Luaopen_base (L);

Lual_openlibs (L);

Lual_loadfile (L, "Add.lua");

Lua_pcall (L, 0, Lua_multret, 0);

sum = Luaadd (10, 15);

printf ("The sum is%d\n", sum);

Lua_close (L);

return 0;

}

Add.lua

1--simple example, only do integer addition

2 function Add (x, y)

3 return x + y

4 End

When there is no problem after compiling, there are some problems with the execution, as follows:

Panic:unprotected error in call to Lua APIs (attempt to call a nil value)

Results Google a bit, said is Lual_loadfile replaced Lual_dofile, at that time I used is lual_dofile, this is a possible reason, but not mine.

Finally found the reason, Add.lua placed in the wrong place, I put it in the VS. cpp files in the same directory, and then put into the engineering directory inside.

Available Luaide Downloads: http://www.blueantstudio.net/content/index_static.php

Note: Content reproduced from: http://www.cnblogs.com/good90/archive/2012/08/19/2645997.html