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#include <chrono>
#include <cstdio>
#include <random>

void
doStuff()
{
    std::random_device                     random;
    std::uniform_real_distribution<double> uniform(-100, 100);

    volatile double foo = 0;
    for (std::size_t i=0; i<1000*1000; ++i) {
        foo += uniform(random);
    }
}

int
main()
{
    std::chrono::high_resolution_clock::time_point  t0;
    std::chrono::high_resolution_clock::duration    elapsed;

    //
    // bench doStuff()
    //
    t0       = std::chrono::high_resolution_clock::now();

    doStuff();

    elapsed = std::chrono::high_resolution_clock::now() - t0;

    //
    // Convert duration into seconds and store it in a double
    //
    double elapsedSeconds
        = std::chrono::duration<double,std::chrono::seconds::period>(elapsed).count();

    printf("Time elapesd in seconds: %5.2lf\n", elapsedSeconds);
}





































































































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