fig23_32.cpp

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. 23.32: Fig23_32.cpp
// Standard Library algorithms iter_swap, swap and swap_ranges.
#include <iostream>
using std::cout;
using std::endl;

#include <algorithm> // algorithm definitions
#include <iterator> 

int main()
{
   const int SIZE = 10;
   int a[ SIZE ] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
   std::ostream_iterator< int > output( cout, " " );

   cout << "Array a contains:\n   ";
   std::copy( a, a + SIZE, output ); // display array a

   // swap elements at locations 0 and 1 of array a
   std::swap( a[ 0 ], a[ 1 ] );

   cout << "\nArray a after swapping a[0] and a[1] using swap:\n   ";
   std::copy( a, a + SIZE, output ); // display array a

   // use iterators to swap elements at locations 0 and 1 of array a
   std::iter_swap( &a[ 0 ], &a[ 1 ] ); // swap with iterators                       
   cout << "\nArray a after swapping a[0] and a[1] using iter_swap:\n   ";
   std::copy( a, a + SIZE, output );

   // swap elements in first five elements of array a with
   // elements in last five elements of array a 
   std::swap_ranges( a, a + 5, a + 5 );

   cout << "\nArray a after swapping the first five elements\n"
        << "with the last five elements:\n   ";
   std::copy( a, a + SIZE, output );
   cout << endl;
   return 0;
} // end main


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