// // Created by yinus on 2016/4/2. // #ifndef DS_AA_VECTOR_H #define DS_AA_VECTOR_H #include<algorithm> template <typename Object> class Vector { private: int theSize; int theCapacity; Object *objects; public: static const int SPARE_CAPACITY=16; explicit Vector(int initSize=0):theSize(initSize),theCapacity(initSize+SPARE_CAPACITY){ objects=new Object[theCapacity];} Vector(const Vector& rhs):theSize(rhs.theSize),theCapacity(rhs.theCapacity),objects(nullptr){ objects=new Object[theCapacity]; for (int i = 0; i < theSize; ++i) objects[i]=rhs.objects[i]; } Vector & operator=(const Vector &rhs){ Vector copy=rhs; std::swap(*this,copy); return *this; } ~Vector(){delete []objects;} Vector(Vector &&rhs):theSize(rhs.theSize),theCapacity(rhs.theCapacity),objects(rhs.objects){ rhs.objects= nullptr; rhs.theSize=0; rhs.theCapacity=0; } Vector& operator=(Vector &rhs){ std::swap(theSize,rhs.theSize); std::swap(theCapacity,rhs.theCapacity); std::swap(objects,rhs.objects); return *this; } void resize(int newSize){ if (newSize>theCapacity) reverse(newSize*2); theSize=newSize; } void reverse(int newCapacity){ if (newCapacity<theSize) return; Object *newArray = new Object[newCapacity]; for (int i = 0; i < theSize; ++i) newArray[i]=std::move(objects[i]); theCapacity=newCapacity; std::swap(objects,newArray); delete [] newArray; } Object &operator[](int index){ return objects[index]; } const Object &operator[](int index) const{ return objects[index]; } bool empty(){ return size()==0; } int size() const { return theSize; } int capaticy(){ return theCapacity; } void push_back(const Object &x){ if (theSize==theCapacity) reverse(2*theCapacity+1); objects[theSize++]=x; } void push_back(Object &&x){ if (theSize==theCapacity) reverse(theCapacity*2+1); objects[theSize++]=std::move(x); } void pop_back(){ --theSize; } const Object &back() const{ return objects[theSize-1]; } typedef Object* iterator; typedef const Object* const_iterator; iterator begin(){ return &objects[0]; } const_iterator begin()const { return &objects[0]; } iterator end(){ return &objects[size()]; } const_iterator end() const{ return &objects[size()]; } }; #endif //DS_AA_VECTOR_H
时间: 2024-11-10 13:53:31