# LUA Programming

All

Intro

Hey boy, just use this Lua script and everything will be ok on your game. It’s all embedded!

Lua

An interesting tutorial about Lua embedded is [1]. So cool to learn about embedding Lua in C and C++. The code below, from the same source, is so simple and prints:

```The average is  30
The sum is      150```
```#include <stdio.h>

#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"

/* the Lua interpreter */
lua_State* L;

/* The function we'll call from the lua script */
static int average(lua_State *L)
{
/* get number of arguments */
int n = lua_gettop(L);
double sum = 0;
int i;

/* loop through each argument */
for (i = 1; i <= n; i++)
{
if (!lua_isnumber(L, i))
{
lua_pushstring(L, "Incorrect argument to 'average'");
lua_error(L);
}

/* total the arguments */
sum += lua_tonumber(L, i);
}

/* push the average */
lua_pushnumber(L, sum / n);

/* push the sum */
lua_pushnumber(L, sum);

/* return the number of results */
return 2;
}

int main ( int argc, char *argv[] )
{
/* initialize Lua */
L = lua_open();

/* load Lua base libraries */
lua_baselibopen(L);

/* register our function */
lua_register(L, "average", average);

/* run the script */
lua_dofile(L, "average.lua");

/* cleanup Lua */
lua_close(L);

return 0;
}```

REFs