examples/manual/max.cpp

/**************************************************************************
 *
 * max.cpp - Example program for finding maximum of a pair of values.
 *
 * $Id$
 *
 ***************************************************************************
 *
 * 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 <algorithm>    // for max, min
#include <functional>   // for greater
#include <iostream>     // for cout

#include <examples.h>


int main ()
{
    double d1 = 10.0, d2 = 20.0;

    // Find minimum.
    double val1 = std::min (d1, d2);

    // The greater comparator returns the greater of the two values.
    double val2 = std::min (d1, d2, std::greater<double>());

    // Find minimum.
    double val3 = std::max (d1, d2);

    // The less comparator returns the smaller of the  two values.

    // Note that, like every comparison in the library, max is
    // defined in terms of the < operator, so using less here
    // is the same as using the max algorithm with a default
    // comparator.
    double val4 = std::max(d1, d2, std::less<double>());

    std::cout << val1 << " " << val2 << " "
              << val3 << " " << val4 << std::endl;

    return 0;
}