Array.h

#include <cassert>
#include <iomanip>
#include <iostream>
using namespace std;

class IndexOutOfBoundsException{};

template
	< typename Type >
class Array
{
private:
	int len;
	Type * buf;
public:
	Array(int newLen)
		:len( newLen ), buf( new Type [newLen] )
	{
	}
	Array( const Array & l)
		: len( l.len ), buf( new Type [l.len] )
	{
		for( int i = 0; i < l.len; i++ )
			buf[i] = l.buf[i]; // note = is incorrect if buf elements are pointers
	}
	int length()
	{
		return len;
	}
	Type &operator [] (int i)
		throw (IndexOutOfBoundsException)
	{
		if (!(0 <= i && i < len))
			throw IndexOutOfBoundsException();
		return buf[i];
	}
	void print(ostream & out)
	{
		for(int i = 0; i < len; ++i)
			out << setw(8) << setprecision(2) << fixed << right << buf[i]; // #include <iomanip>
	}
	~Array()
	{
		delete [] buf;
	}
	friend ostream & operator << ( ostream & out, Array & a )
	{
		a.print( out );
		return out;
	}
	friend ostream & operator << (ostream & out, Array * ap)
	{
		ap -> print( out );
		return out;
	}
	// note the overloading of operator << on a pointer as wel
};