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

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+/**************************************************************************
+ *
+ * valarray.cpp -- valarray example
+ *
+ * $Id: valarray.cpp 584973 2007-10-15 23:40:04Z 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 1994-2007 Rogue Wave Software, Inc.
+ * 
+ **************************************************************************/
+
+#include <cstddef>      // for size_t
+#include <iostream>     // for cout
+#include <valarray>     // for valarray
+
+#include <examples.h>
+
+
+template <class T> 
+inline std::ostream&
+operator<< (std::ostream &out, const std::valarray<T> &v)
+{
+    out << '[';
+
+    for (std::size_t i = 0; i < v.size (); ++i) {
+        out << v [i];
+        if (i < v.size () - 1)
+            out << ',';
+    }
+
+    return out << ']';
+}
+
+
+int main ()
+{
+    const int ibuf[]  = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };  
+    const int ibuf2[] = { 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };  
+
+    // create 2 valarrays of ints
+    std::valarray<int> vi (ibuf, sizeof ibuf / sizeof *ibuf);
+    std::valarray<int> vi2 (ibuf2, sizeof ibuf2 / sizeof *ibuf2);
+
+    // print them out
+    std::cout << vi << '\n' << vi2 << '\n';
+
+    vi += vi2;
+    vi2 *= 2;
+
+    std::valarray<int> vi3 = vi2 % vi;
+
+    // print them out again
+    std::cout << vi << '\n' << vi2 << '\n' << vi3 << '\n';
+
+    return 0;
+}