array.cpp

《c＋＋大学教程》源码

// Fig 22.7: array.cpp
// Member function definitions for class Array.
#include <iostream>

using std::cout;
using std::ostream;

#include <new>

#include "array.h"

// default constructor for class Array (default size 10)
Array::Array( int arraySize )
{
   size = ( arraySize < 0 ? 10 : arraySize ); 
   cout << "Array constructor called for " 
        << size << " elements\n";

   // create space for array
   ptr = new int[ size ];

   // initialize array elements to zeroes
   for ( int i = 0; i < size; i++ )
      ptr[ i ] = 0;          

}  // end constructor

// destructor for class Array
Array::~Array() { delete [] ptr; }

// overloaded stream insertion operator for class Array 
ostream &operator<<( ostream &output, const Array &arrayRef )
{
   for ( int i = 0; i < arrayRef.size; i++ )
      output << arrayRef.ptr[ i ] << ' ' ;

   return output;   // enables cout << x << y;

}  // end operator<<

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