array.h

是有关C++编程原理教程的例子程序,全,应该对大家有所帮助

// Fig. 11.6: Array.h
// Array class for storing arrays of integers.
#ifndef ARRAY_H
#define ARRAY_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

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

   // 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 modifiable lvalue
   int &operator[]( int );              

   // subscript operator for const objects returns rvalue
   int operator[]( int ) const;  
private:
   int size; // pointer-based array size
   int *ptr; // pointer to first element of pointer-based array
}; // end class Array

#endif

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