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SingingWaiter
2024-08-16
多继承
publicWorker{}//基类publicSinger:publicWorker{}//继承WorkerpublicWaiter:publicWokrer{}//继承WorkerpublicSingingWaiter:publicSinger,publicWaiter{}//多继承SingingWaitered;Worker*pw=&ed;//二义性Worker*pw1=(Waiter*)&ed;Worker*pw2=(Singer*)&a