virtual bool delmember(const Tx)=0; virtual Set<t> intersect With (set<t>&r)=0; /(集合的交运算 virtual Set<t> union With(Set<>&r)=0; 集合的并运算 virtual Set<t> difference from (Set<t>&r)=o ′集合的差运算 virtual bool Contains(Tx)=0; virtual bool subSet(Set<T>&r)=0; virtual bool operator==(Set<t>&r)=0; 判集合是否相等virtual bool delMember (const T x) = 0; virtual Set<T> intersectWith (Set<T>& R) = 0; //集合的交运算 virtual Set<T> unionWith (Set<T>& R) = 0; //集合的并运算 virtual Set<T> differenceFrom (Set<T>& R) = 0; //集合的差运算 virtual bool Contains (T x) = 0; virtual bool subSet (Set<T>& R) = 0; virtual bool operator == (Set<T>& R) = 0; //判集合是否相等 }; 5