(C++) ctime (header file)

C++ Standard header file for C library facilities [2]. It contains time-related functions and structs.

ctime is a C++ standard header file [2], but time is not [1,2].

The example below shows how to test the speed of the STL's std::rand function:

include <iostream>

include <ctime>


int main()
{
  const clock_t begin = std::clock();
  for (int i=0; i<10000000; ++i) std::rand();
  const clock_t end = std::clock();
  std::cout << "Time of STL rand(): " 
    << std::difftime(end,begin) << std::endl;
}

Same example using the Boost C++ library

include <iostream>

include <boost/timer.hpp>


int main()
{
  boost::timer t;
  for (int i=0; i<10000000; ++i) std::rand();
  std::cout << t.elapsed() << std::endl;
}

Code links

C++ Library headers

From [1].

C++ Headers for C library facilities

From [2].

References

1) C++ International Standard. ISO/IEC 14882. Second edition. Table 11.
2) C++ International Standard. ISO/IEC 14882. Second edition. Table 12.

last edited (November 15, 2006) by bilderbikkel, Number of views: 1931, Current Rev: 3 (Diff)

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