61 lines
2.2 KiB
C++
61 lines
2.2 KiB
C++
/**************************************************************************
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*
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* mask_array.cpp -- Mask array examples
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*
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* $Id: mask_array.cpp 550991 2007-06-26 23:58:07Z sebor $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 1994-2006 Rogue Wave Software.
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*
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**************************************************************************/
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#include <iostream> // for cout, endl
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#include <valarray.h> // Includes valarray and provides stream inserter.
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#include <examples.h> // Generic header for all examples.
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typedef std::valarray<int> valarray_t;
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typedef std::valarray<bool> maskarray_t;
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int main(void) {
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// Create a valarray of ints.
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valarray_t::value_type ibuf[10] = {0,1,2,3,4,5,6,7,8,9};
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valarray_t vi(ibuf, 10);
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// Create a valarray of bools for a mask.
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maskarray_t::value_type mbuf[10] = {1,0,1,1,1,0,0,1,1,0};
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maskarray_t mask(mbuf,10);
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// Print out the valarray<int>.
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std::cout << "original valarray<int> vi\n\n" << vi << "\n\n";
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// Print out the valarray<bool>.
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std::cout << "original valarray<bool> mask\n\n" << mask << "\n\n";
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// Print a mask array.
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std::cout << "vi[mask]\n\n" << vi[mask] << "\n\n";
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// Double the values of the masked array and print out.
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vi[mask] += static_cast<valarray_t> (vi[mask]);
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std::cout << "vi[mask] += vi[mask]\n\n" << vi << std::endl;
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return 0;
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}
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