int IsFull o i if (rear==Maxsize-1) return 1 else return o int IsEmpty o i if (front==rear) return 1 else return 0 void Add(const keytype &) keytype Delete(void)int IsFull () { if (rear==Maxsize-1) return 1; else return 0; }; int IsEmpty () { if (front==rear) return 1; else return 0; }; void Add(const keytype &); keytype Delete(void); };