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

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+/**************************************************************************
+ *
+ * set_intr.cpp - Example program of set intersection algorithm.
+ *
+ * $Id: set_intr.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>
+#include <set>
+#include <iostream>
+#include <iterator>
+
+int main ()
+{
+    // Initialize some sets.
+    const int a1 [] = { 1, 3, 5, 7, 9, 11 };
+    const int a3 [] = { 3, 5, 7, 8 };
+    std::set<int, std::less<int>, std::allocator<int>  >
+        odd (a1 + 0, a1 + 6),
+        result,
+        smalll (a3 + 0, a3 + 4);
+
+    // Create an insert_iterator for result.
+
+    std::insert_iterator<std::set<int, std::less<int>, std::allocator<int> > >
+        res_ins (result, result.begin ());
+
+    // Demonstrate set_intersection.
+
+    typedef std::ostream_iterator<int, char, std::char_traits<char> > Iter;
+
+    std::cout << "The result of:\n{";
+
+    std::copy (smalll.begin (),smalll.end (), Iter (std::cout, " "));
+    std::cout << "} intersection {";
+
+    std::copy (odd.begin (), odd.end (), Iter (std::cout, " "));
+    std::cout << "} =\n{";
+
+    std::set_intersection (smalll.begin (),smalll.end (),
+                           odd.begin (), odd.end(),
+                           res_ins);
+
+    std::copy (result.begin (), result.end (), Iter (std::cout, " "));
+    std::cout << "}\n\n";
+
+    return 0;
+}