Using the Subscript Operator in Programming a Dynamic Array

  
#include <iostream>
using namespace std;
class CMyArray
{
private:
    int* m_pnInternalArray;
   int m_nNumElements;
public:
   CMyArray (int nNumElements);
   ~CMyArray ();

    // a subscript operator
    int& operator [] (int nIndex);
};

int& CMyArray::operator [] (int nIndex)
{
    return m_pnInternalArray [nIndex];
}

CMyArray::CMyArray (int nNumElements)
{
    m_pnInternalArray = new int [nNumElements];
   m_nNumElements = nNumElements;
}
CMyArray::~CMyArray ()
{
   delete [] m_pnInternalArray;
}

int main ()
{
    CMyArray mArray (5);

    mArray [0] = 25;
    mArray [1] = 20;
    mArray [2] = 15;
    mArray [3] = 10;
    mArray [4] = 5;

    for (int nIndex = 0; nIndex < 5; ++ nIndex)
        std::cout << mArray [nIndex] << " ";

    return 0;
}

Related examples in the same category

1.	Demo: Overload ().
2.	Overload [] to create a generic safe array type.
3.	Demonstrate the function call operator.

Using the Subscript Operator in Programming a Dynamic Array : Parenthesis « Overload « C++

Related examples in the same category