没有可行的重载'='

Question

我现在正在使用C++进行模拟课程,并且在标题中引用了clang ++错误.我希望有人可以告诉我为什么,因为我似乎无法在任何地方找到类似的错误(尽可能搜索).

每个Office*变量定义都会发生错误(第187到190行).

175 class EventHandler {
176 
177     private:
178     double simulation_time;    // current simulation time
179     Office* aid, bursar, registrar, parking;
180     Event* current_event;
181     MinHeap* time_heap;
182 
183     public:
184 
185     void initialize_simulation() {  // initializes simulation time, offices, and event handler (time_heap)
186         simulation_time = 0;
187         aid = new Office(8, Tf);    // initializes financial aid office with Tf tellers, with serve time exponentially distributed with mean of 8 minutes
188         bursar = new Office(15, Tb);     // initializes bursar office w/ Tb tellers, exp distro, mean 15 min
189         registrar = new Office(5, Tr);    // registrar w/ Tr tellers, exp distro, mean 5 min
190         parking = new Office(10,Tp);       // parking office w/ Tp tellers, exp distro, mean 10
192         MinHeap* time_heap = new MinHeap();
193     }

如果我替换Office* aid声明(例如),并更改aid = new Office(15, Tf)为Office* aid = new Office(15, Tf),则错误消失.我不知道为什么,也非常愿意,因为我想要所有这些类指针private.

有趣的是(恼人的？),MinHeap* time_heap; time_heap = new MinHeap();不会造成任何问题.我认为它可能与声明指针var private 然后public在类的部分中定义它但它看起来像没有关系.

救命？= |

Answer 1

Office* aid, bursar, registrar, parking;

声明一个指针和3个对象.你可能认为你想要:

Office *aid, *bursar, *registrar, *parking;

你真的想要:

std::unique_ptr<Office> aid;
std::unique_ptr<Office> busar;
std::unique_ptr<Office> parking;
std::unique_ptr<Office> registrar;

并在构造函数初始化列表中初始化它们.如果该类不是资源所有者,请使用std::shared_ptr.