据说是facebook的面试题
设计一个variant类,这个类有如下特征
variant v = string("jams");
variant v2 = 18;
variant jam["name"] = v;
jam["age"] = v2;
jam["sex"] = string("famale");
jam["hobby"] = variant.list_elem()
variant hobby = jam["hobby"];
hobby[0] = string("basketball");
hobby[1] = string("baseball");
hobby[2] = string("classic music");
const int MAGIC_NUM1 = 0x101010;
const int MAGIC_NUM2 = 0x101011;
hobby[3] = variant(MAGIC_NUM1);
hobby[4] = MAGIC_NUM2;
jam["address"]["state"] = string("");
jam["address"]["city"] = string("");
cout << jam["address"]["city"] << ", " << jam["age"] << endl;