c/c++调用lua脚本，传入/返回普通参数

lua脚本

function callLuascript(b,i,f,s)
    print("callLuascript=",b,i,f,s)
    return not b,i+1,f+2,s.."script"
end

c/c++中调用

void callLuascript(lua_State* L)
{
    lua_settop(L, 0);
    lua_getglobal(L, "callLuascript");
    /*脚本函数的参数顺序，依次为压入的顺序。也就是说c++参数压入栈的顺序与脚本函数入参顺序一致*/
    lua_pushboolean(L, true);
    lua_pushinteger(L, 2);
    lua_pushnumber(L, 7.2);
    lua_pushstring(L, "c++call");
    if (LUA_OK == lua_pcall(L, 4, 4, 0))
    {
        /*脚本函数返回的多个参数，第一个参数在栈底，最后一个参数在栈顶*/
        if (lua_isboolean(L, 1)) {
            std::cout << 1 << "bool:"<<std::boolalpha<< !!lua_toboolean(L, 1)<<'\n';
        }
        if (lua_type(L, 2) == LUA_TNUMBER && lua_isinteger(L, 2)) {
            std::cout << 2 << "int:" << lua_tointeger(L, 2) << '\n';
        }
        if (lua_type(L, 3) == LUA_TNUMBER && !lua_isinteger(L, 3)) {
            std::cout << 3 << "number:" << lua_tonumber(L, 3) << '\n';
        }
        if (lua_isstring(L, 4)) {
            std::cout << 4 << "string:" << lua_tostring(L, 4) << '\n';
        }
    }
}