//
//   This file contains the C# code from Program 4.8 of
//   "Data Structures and Algorithms
//    with Object-Oriented Design Patterns in C#"
//   by Bruno R. Preiss.
//
//   Copyright (c) 2001--2002 by Bruno R. Preiss, P.Eng.  All rights reserved.
//
//   http://www.brpreiss.com/books/opus6/programs/pgm04_08.txt
//
public class MultiDimensionalArray
{
    private int[] dimensions;
    private int[] factors;
    private object[] data;

    private int GetOffset(int[] indices)
    {
	if (indices.Length != dimensions.Length)
	    throw new IndexOutOfRangeException();
	int offset = 0;
	for (int i = 0; i < dimensions.Length; ++i)
	{
	    if (indices[i] < 0 || indices[i] >= dimensions[i])
		throw new IndexOutOfRangeException();
	    offset += factors[i] * indices[i];
	}
	return offset;
    }

    public object this[params int[] indices]
    {
	get { return data[GetOffset(indices)]; }
	set { data[GetOffset(indices)] = value; }
    }
    // ...
}