fig08_15.cpp.bak

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. 8.15: fig08_15.cpp
// This program puts values into an array, sorts the values into
// ascending order and prints the resulting array.
#include <iostream> 
using std::cout; 
using std::endl; 

#include <iomanip>
using std::setw;

void selectionSort( int * const, const int ); // prototype
void swap( int * const, int * const ); // prototype

int main()
{
   const int arraySize = 10;
   int a[ arraySize ] = { 2, 6, 4, 8, 10, 12, 89, 68, 45, 37 };

   cout << "Data items in original order\n";

   for ( int i = 0; i < arraySize; i++ )
      cout << setw( 4 ) << a[ i ];

   selectionSort( a, arraySize ); // sort the array

   cout << "\nData items in ascending order\n";

   for ( int j = 0; j < arraySize; j++ )
      cout << setw( 4 ) << a[ j ];

   cout << endl;
   return 0; // indicates successful termination
} // end main

// function to sort an array
void selectionSort( int * const array, const int size )
{
   int smallest; // index of smallest element

   // loop over size - 1 elements
   for ( int i = 0; i < size - 1; i++ )
   {
      smallest = i; // first index of remaining array

      // loop to find index of smallest element
      for ( int index = i + 1; index < size; index++ )

         if ( array[ index ] < array[ smallest ] )
            smallest = index;

      swap( &array[ i ], &array[ smallest ] );
   } // end if
} // end function selectionSort

// swap values at memory locations to which
// element1Ptr and element2Ptr point
void swap( int * const element1Ptr, int * const element2Ptr )
{
   int hold = *element1Ptr;
   *element1Ptr = *element2Ptr;
   *element2Ptr = hold;
} // end function swap

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