arraytp.h

// arraytp.h -- Array Template
#ifndef ARRAYTP_H_
#define ARRAYTP_H_

#include <iostream>
#include <cstdlib>

template <class T, int n>
class ArrayTP
{
private:
	T ar[n];
public:
	ArrayTP() {};
	explicit ArrayTP (const T & v);
	virtual T & operator[] (int i);
	virtual T operator[] (int i) const;
};

template <class T, int n>
ArrayTP<T, n>::ArrayTP (const T & v)
{
	for (int i = 0; i < n; i++) {
		ar[i] = v;
	}
}

template <class T, int n>
T & ArrayTP<T, n>::operator[] (int i)
{
	if (i < 0 || i >= n) {
		std::cerr << "Error in array limits: " << i
			<< " is out of range\n";
		std::exit (EXIT_FAILURE);
	}
	return ar[i];
}

template <class T, int n>
T ArrayTP<T, n>::operator[] (int i) const
{
	if (i < 0 || i >= n) {
		std::cerr << "Error in array limits: " << i
			<< "is out of range\n";
		std::exit (EXIT_FAILURE);
	}
	return ar[i];
}

#endif