自已实现Vector

无聊的时候就阅读一下代码，下列代码涉及到基础的c++知识。 温故而知新。

#include<iostream>
using namespace std;

template <typename Object>

class Vector{	
	private:
		int thesize;
		int theCapacity;
		Object *objects;
		
    public:
		//构造函数
		Vector(int initsize = 0) : thesize(initsize),theCapacity(initsize+SPARE_CAPACITY)

                                 {

                                 objects = new Object[theCapacity];

                                  }
	  
		//拷贝构造函数
		Vector(const Vector & rth) : objects(NULL) {		

		                // operator=(rth);	
			  cout<<"dd2"<<endl;
                                                //不相等删除现对象
			if(this != &rth){	
			   cout<<"dd"<<endl;
			//	if(objects)
			//	{
			//	  delete [] objects;
			//	}
                                               //重新定义大小
			thesize = rth.size();
			theCapacity = rth.capacity();
            
			//objects重新赋值
			//objects = new Object[capacity()];
			objects = new Object[theCapacity];
			cout<<"ff"<<theCapacity<<endl;
			for(int i=0;i<size();i++)
				objects[i] = rth.objects[i];
			}
	
			

		}
                                //析构
		~Vector(){
		//	if(objects) delete [] objects;
			cout<<"析构"<<objects<<endl;
			delete []objects;
			objects=NULL;
		};
		
                              //赋值重载并拷贝
	 	const Vector & operator= (const Vector & rth){
			
			//不相等删除现对象
			if(this != rth){	
				//if(objects)
			//	{
				  delete [] objects;
			//	}
                                               //重新定义大小
			thesize = rth.size();
			theCapacity = rth.theCapacity();
            
			//objects重新赋值
			objects = new Object[capacity()];
			for(int i=0;i<size();i++)
				objects[i] = rth.objects[i];
			}
			return *this;
		}

	
	
                                //重设大小
		void resize(int newsize){
			if(newsize>theCapacity)
				reserve(newsize*2 + 1);
			theSize = newsize;

		}
                                //
		void reserve(int newcapacity){
			if(newcapacity<thesize)
				return;

			Object *oldArry = objects;
			objects = new Object[newcapacity];
			for(int i=0;i<thesize;i++)
				objects[i] = oldArry[i];

			theCapacity = newcapacity;
			delete [] oldArry;
		}
                                //[]运算符重载
		Object & operator[](int index){
			return objects[index];
		}
                                //[]运算符重载常量函数
		const Object & operator[] (int index) const{
			return objects[index];
		}
                               //判断是否为空
		bool empty(){
			return thesize() == 0;
		}
                               //返回容器大小
		int size() const{
			return thesize;
		}
                               //返回容器容量
		int capacity() const{
			return theCapacity;
		}
                              //添加数据
		void push_back(const Object & x){
			if(thesize == theCapacity)
				reserve(theCapacity*2 + 1);
			objects[thesize++] = x;
		}
                             //出数据
		const Object &  pop_back(){
			theSize--;

                                                if(theSize<0)   

                                                   theSize=0;

                                               return objects[theSize]=x;                                           

                                                 
		}
                             //取最后一个对象
		const Object & back(){
			return objects[theSize-1];
		}
                             //定义一个迭代对象指针
		typedef Object * iterator;
	            //定义一个迭代对象常量指针
		typedef const Object * const_iterator;

	             //返回容器的第一个迭代
		iterator begin(){
			return &objects[0];
		}
                             //返回容器的第一个迭代的常量函数
		const_iterator begin() const{
			return &objects[0];
		}
                            //返回容器的最后一个迭代
		iterator end(){
			return &objects[thesize()];
		}
                           //返回容器的最后一个迭代的常量涵数
		const_iterator end() const{
			return &objects[thesize()];
		}

		enum{SPARE_CAPACITY};
};

int main(){
	Vector<int> vint;   //定义一个int 容器对象

	//赋值
	for(int i=0;i<10;i++)
		vint.push_back (i);

	cout<<"dfdf"<<endl;
               //将vint拷贝给vint2
	Vector<int> vint2(vint);

              //将vint2赋值给vint3
              //Vector<int> vint3;
               //vint3= vint;

               //输出vint的大小
	cout<<vint.size ()<<endl;

	//输出vint的
	cout<<vint.capacity ()<<endl;

	return 0;
}