myArray.h (DailyC++) 7/23/12

/// http://www.cplusplus.com/forum/beginner/75558/
#ifndef MYARRAY_H
#define MYARRAY_H
#include <iostream>
#include <cstdlib>
template <class T>
class myArray
{
    private:
        T * myArr;
        int size;
        int startpos;
        int endpos;
    public:
        myArray(int elements);
        myArray(int start, int end);
        ~myArray();
         void SetNULL();
         T & operator[](int i);

        friend std::ostream & operator<<(std::ostream & os, myArray<T> & arr)
        {
                          os << "{";
            for(int i = 0; i < arr.size; i++)
            {
                if(i == (arr.size - 1))
                    os << arr.myArr[i];
                else
                    os << arr.myArr[i] << ",";
            }
            os << "}\n";
            return os;
        }

};

template <class T>
T & myArray<T>::operator[](int i)
{
    if(i > size)                    //IF OUT OF BOUNDS
        throw std::string("Element out of array bounds...nothing to be done");
    else if(startpos == 0)          //IF NORMAL ARRAY
        return myArr[i];
    else                            //IF CUSTOM BOUNDS
    {
        return myArr[(startpos + (i - 1))];
    }


}


template <class T>
myArray<T>::myArray(int elements):
size(elements), startpos(0), endpos(elements)
{
    myArr = new T[size];            //ALLOCATE SPACE FOR ARRAY
    SetNULL();                      //ZERO OUT
}

template <class T>
myArray<T>::myArray(int start, int end):
startpos(start),                    //START POS
endpos(end)
{
    if(start > end)                 //END IF INVALID BOUNDS
    {
        std::cerr << "Invalid start and end position..terminating...\n";
        exit(0);
    }else
        size = end - start;         //DETERMINE SIZE
    myArr  = new T[size];           //ALLOCATE SPACE FOR ARRAY
    SetNULL();

}

template <class T>
myArray<T>::~myArray()
{
    delete [] myArr;
}

template <class T>
void myArray<T>::SetNULL()          //SET ARR TO ZERO
{
    for(int i = 0; i < size; i++)
    {
        myArr[i] = (T)0;
    }
}


#endif // MYARRAY_H