//File        : SimpleVector.h
//Author      : Andre Long  and Tony Gaddis (Book Author)
//Due         : November 30, 2004
//Description : Make homemade push_back and pop_back functions which emulate their counter
//              parts in the STL


//SimpleVector class template
#ifndef SIMPLEVECTOR_H
#define SIMPLEVECTOR_H
#include<iostream>
#include<new>
#include<cstdlib>
using namespace std;

template <class T>
class SimpleVector
{
private:
	T*aptr;
	T*bptr;
	int arraySize;
	void memError()
	{
		cout<<"ERROR: Cannot allocate memory. "<<endl;
		exit(0);
	}
	
	void subError()
	{
		cout<<"ERROR: Subscript out of range. "<<endl;
		exit(0);
	}

public:
	SimpleVector()
	{
       aptr = 0;
	   arraySize = 0;
	}
    
	
	SimpleVector(int s)
	{
       arraySize = s;
	   // Allocate memory for the array.
	   try
	   {
          aptr = new T [s];
	   }
	   catch (bad_alloc)
	   {
          memError();
	   }
       // Initialize the array.
	   for (int count = 0; count < arraySize; count++)
	   {
          *(aptr + count) = 0;
	   }
			   
	}//ends parametize constructor

	
	SimpleVector(const SimpleVector &obj)
	{
       arraySize = obj.arraySize;
	   aptr = new T [arraySize];
	   if(aptr==0)
	   {
          memError();
	   }

	   for(int count=0; count<arraySize; count++)
	   {
          *(aptr + count) = (obj.aptr + count);
	   }
	}//ends copy constructor

	~SimpleVector()
	{
       if(arraySize > 0)
		   delete [] aptr;
	}//ends destructor

	int size()
	{
       return arraySize;
	}

	T &operator[] (const int &sub)
	{
       if(sub < 0 || sub > arraySize)
	   {
          subError();
	   }
	   return aptr[sub];
	}

	void pushBack( T val)
	{
      

	   bptr = new T[arraySize+1];
	   for(int count=0; count<arraySize; count++)
	   {
          *(bptr + count) = *(aptr + count);
	   }
	   *(bptr + arraySize)=val;

	   delete[] aptr;
	   aptr=bptr;
	   arraySize++;
	}

	void popBack()
	{
       bptr = new T[arraySize-1];
	   for(int count=0; count<arraySize-1; count++)
	   {
          *(bptr + count) = *(aptr + count);
	   }
	   delete[] aptr;
	   aptr=bptr;
	   arraySize--;

	}

	int getArraySize()
	{
       return arraySize;
	}

};//ends class
#endif