std::difftime is an STL function to obtain the time difference in ticks between two std::clock_t structures.

std::difftime is defined in the header file ctime.h.


#include <cstdlib>

#include <ctime>

#include <iostream>



int main()

{

  const std::clock_t begin = std::clock();

  for (int i=0; i!=10000000; ++i) std::rand();

  const std::clock_t end = std::clock();

  const double n_seconds = std::difftime(end,begin) / CLOCKS_PER_SEC;

  std::cout << "Elapsed time: " << n_seconds << " seconds\n";

}

Screen output (elapsed time might differ):


Elapsed time: 0.16 seconds

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(C++) std::difftime