#include <cstdlib> // for drand48()
#include <cstdio> // for printf()
#include <sys/time.h> // for gettimeofday()

// note: we probably don't want gettimeofday() but keeping the concepts simple
// for now, cf https://[Log in to view URL]

int main()
{
    struct timeval start, stop;
    gettimeofday(&start,nullptr);
    double d[1000000];
    for(int i=0; i<1000000; i++)
        d[i]=drand48();
    gettimeofday(&stop,nullptr);
    auto elapsed = (stop.tv_sec * 1000000LL + stop.tv_usec)
                 - (start.tv_sec * 1000000LL + start.tv_usec);
    printf("operation took %g seconds\n",elapsed/1000000.0);
    printf("%g %g %g\n",d[0], d[1], d[2]);
    return 0;
}