array1.h

《c＋＋大学教程》源码

// Fig. 8.4: array1.h
// Array class for storing arrays of integers.
#ifndef ARRAY1_H
#define ARRAY1_H

#include <iostream>

using std::ostream;
using std::istream;

class Array {
   friend ostream &operator<<( ostream &, const Array & );
   friend istream &operator>>( istream &, Array & );

public:
   Array( int = 10 );       // default constructor
   Array( const Array & );  // copy constructor
   ~Array();                // destructor
   int getSize() const;     // return size

   // assignment operator
   const Array &operator=( const Array & ); 
   
   // equality operator
   bool operator==( const Array & ) const;  

   // inequality operator; returns opposite of == operator
   bool operator!=( const Array &right ) const  
   { 
      return ! ( *this == right ); // invokes Array::operator==
   
   } // end function operator!=
   
   // subscript operator for non-const objects returns lvalue
   int &operator[]( int );              

   // subscript operator for const objects returns rvalue
   const int &operator[]( int ) const;  
   
private:
   int size; // array size
   int *ptr; // pointer to first element of array

}; // end class Array

#endif

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 * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice      *
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