bool dofile(lua_State* L,const char* str)
{
	int err = luaL_loadfile(L,str);
	if (err == LUA_ERRSYNTAX)
	{
		cout<<"Syntax error in ["<<str<<"] :"<<getErr(L)<<std::endl;
		return false;
	}
	
	err = lua_pcall(L,0,0,0);
	if (err == LUA_ERRRUN) 
	{
		cout<<"Runtime error in ["<<str<<"] :"<<getErr(L)<<std::endl;
		return false;
	}
	if (err != 0)
	{
		cout<<"Unknown error!"<<std::endl;
		return false;
	}
	return true;
}