(C++) std::difftime

 

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.

 

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#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):

 

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Elapsed time: 0.16 seconds