ceph/src/boost/libs/chrono/doc/stopwatches/hello.qbk

   1 [/
   2  / Copyright (c) 2009-20012 Vicente J. Botet Escriba
   3  /
   4  / Distributed under the Boost Software License, Version 1.0. (See accompanying
   5  / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6  /]
   7
   8
   9 [/=====================]
  10 [/section Hello World! ]
  11 [/=====================]
  12
  13 If all you want to do is to time a program's execution, here is a complete program (stopclock_example.cpp):
  14
  15     #include <boost/chrono_io.hpp>
  16     #include <boost/chrono/stopwatches/reporters/stopclock.hpp>
  17     #include <cmath>
  18
  19     int main()
  20     {
  21         boost::chrono::system_strict_stopclock _;
  22
  23         for ( long i = 0; i < 10000000; ++i )
  24         std::sqrt( 123.456L ); // burn some time
  25
  26         return 0;
  27     }
  28
  29 Output was:
  30
  31     0.832 seconds
  32
  33
  34