接口网站cppreferencesetunorder_set//unorder_setunorder_set<T>u_set;//insertu_set.insert(Tt);//findandjudgeiteratorit=u_set.find(Tt);if(u_set.find(t)!=it.end()){}//删除u_set.erase(t);技巧如果想要通过一种数据类型种的值构建另一种