A simple example of embedding LuaJIT in C

hello-luajit.c

#include <stdio.h>
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>
#include "luajit.h"

int main(int argc, char *argv[])
{
  int status;
  lua_State *L;
  
  L = luaL_newstate(); // open Lua
  if (!L) {
    return -1; // Checks that Lua started up
  }
  
  luaL_openlibs(L); // load Lua libraries
  if (argc > 1) {
    status = luaL_loadfile(L, argv[1]);  // load Lua script
    int ret = lua_pcall(L, 0, 0, 0); // tell Lua to run the script
    if (ret != 0) {
      fprintf(stderr, "%s\n", lua_tostring(L, -1)); // tell us what mistake we made
      return 1;
    }
  }

  lua_close(L); // Close Lua
  return 0;
}