c++调用lua函数

#include <stdio.h>
extern "C"{
#include "lua.h"
#include "lualib.h"
#include "lauxlib.h"
}
int main(int argc, char *argv[])
{
int s=0;
lua_State *L = lua_open();
//load the libs
luaL_openlibs(L);

//run a lua script here
luaL_dofile(L,"foo1.lua");
lua_getglobal(L,"add");
lua_pushnumber(L,2);
lua_pushnumber(L,13);

lua_call(L,2,1);

int iResult	= (int)lua_tonumber(L,1);
lua_pop(L,1);
printf("/t Result: %d/n/n",iResult);
lua_close(L);
}