examples/manual/slice.cpp

/**************************************************************************
 *
 * slice.cpp -- Valarray slice examples
 *
 * $Id$
 *
 ***************************************************************************
 *
 * 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 <iostream>    // for cout, endl
#include <valarray.h>  // Includes valarray and provides stream inserter.
#include <examples.h>  // Generic header for all examples.


int main ()
{
    typedef std::valarray<int> Valarray;

    // create a non-const valarray of integers
    const Valarray::value_type ia [] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

    Valarray vi (ia, sizeof ia / sizeof *ia);

    // print out its contents
    std::cout << "original valarray vi: "
              << vi << "\n\n";

    // print out a slice of the valarrayt object
    std::cout << "vi [slice (1, 3, 3)]: "
              << vi [std::slice (1, 3, 3)] << '\n';

    // create a const valarray object
    const Valarray vj (ia, sizeof ia / sizeof *ia);

    // print out a slice (uses a different operator)
    std::cout << "vi [slice (0, 5, 2)]: "
              << vj [std::slice (0, 5, 2)] << '\n';

    return 0;
}