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

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+/**************************************************************************
+ *
+ * unique.cpp - Example program of unique algorithm.
+ *
+ * $Id: unique.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, unique_copy
+#include <iostream>    // for cout, endl
+#include <iterator>    // for insert_iterator, ostream_iterator
+#include <vector>      // for vector
+
+int main ()
+{
+    // for convenience
+    typedef std::vector<int, std::allocator<int> >          Vector;
+    typedef std::insert_iterator<Vector>                    Iter;
+    typedef std::ostream_iterator<Vector::value_type, char,
+                                  std::char_traits<char> >  OSIter;
+
+    // Initialize two vectors.
+    const int a1 [] = {
+        4, 5, 5, 9, -1, -1, -1, 3, 7, 5, 
+        5, 5, 6, 7,  7,  7,  4, 2, 1, 1
+    };
+
+    Vector v (a1, a1 + sizeof a1 / sizeof *a1);
+    Vector result;
+
+    // Create an insert_iterator for results.
+    Iter ins (result, result.begin ());
+
+    // Demonstrate includes.
+    std::cout << "The vector: " << std::endl << "    ";
+
+    std::copy (v.begin (), v.end (), OSIter (std::cout, " "));
+
+    // Find the unique elements.
+    std::unique_copy(v.begin(), v.end(), ins);
+
+    // Display the results.
+    std::cout << "\n\nHas the following unique elements:\n     ";
+
+    std::copy (result.begin (), result.end (), OSIter (std::cout, " "));
+    std::cout << std::endl;
+    
+    return 0;
+}