array1.h

经典的<<C how to program>一书第三版的例程。非常适合于C的初学者。

// Fig. 18.4: array1.h
// Simple class Array (for 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
   const Array &operator=( const Array & ); // assign arrays
   bool operator==( const Array & ) const;  // compare equal

   // Determine if two arrays are not equal and
   // return true, otherwise return false (uses operator==).
   bool operator!=( const Array &right ) const  
      { return ! ( *this == right ); }
   
   int &operator[]( int );              // subscript operator
   const int &operator[]( int ) const;  // subscript operator
   static int getArrayCount();          // Return count of 
                                        // arrays instantiated.
private:
   int size; // size of the array
   int *ptr; // pointer to first element of array
   static int arrayCount;  // # of Arrays instantiated
};

#endif



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