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extern/stdcxx/4.2.1/examples/manual/swap.cpp

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+/**************************************************************************
+ *
+ * swap.cpp - Example program of swap algorithm.
+ *
+ * $Id: swap.cpp 550991 2007-06-26 23:58:07Z sebor $
+ *
+ ***************************************************************************
+ *
+ * Licensed to the Apache Software  Foundation (ASF) under one or more
+ * contributor  license agreements.  See  the NOTICE  file distributed
+ * with  this  work  for  additional information  regarding  copyright
+ * ownership.   The ASF  licenses this  file to  you under  the Apache
+ * License, Version  2.0 (the  "License"); you may  not use  this file
+ * except in  compliance with the License.   You may obtain  a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ *
+ * Copyright 1994-2006 Rogue Wave Software.
+ * 
+ **************************************************************************/
+
+#include <algorithm>   // for copy, iter_swap
+#include <iostream>    // for cout, endl
+#include <iterator>    // for ostream_iterator
+#include <vector>      // for vector
+
+int main ()
+{
+    typedef std::ostream_iterator<int, char, std::char_traits<char> > Iter;
+
+    const int a[] = { 6, 7, 8, 9, 10, 1, 2, 3, 4, 5 };
+
+    // Set up a vector.
+    std::vector<int, std::allocator<int> > v (a, a + sizeof a / sizeof *a);
+
+    // Output original vector.
+    std::cout << "For the vector: ";
+    std::copy (v.begin (), v.end (), Iter (std::cout, " "));
+
+    // Swap the first five elements with the last five elements.
+    std::swap_ranges (v.begin (), v.begin () + 5, v.begin () + 5);
+
+    // Output result.
+    std::cout << "\n\nSwaping the first five elements "
+        "with the last five gives: \n     ";
+
+    std::copy (v.begin (), v.end (), Iter (std::cout," "));
+
+    // Now an example of iter_swap -- swap first and last elements.
+    std::iter_swap (v.begin(), v.end () - 1);
+
+    // Output result.
+    std::cout << "\n\nSwaping the first and last elements gives: \n     ";
+    std::copy (v.begin (), v.end (), Iter (std::cout, " "));
+
+    std::cout << std::endl;
+
+    return 0;
+}