#include <iostream>
#include <ctime>
#include <cmath>
#include <cfloat>

const int num_tests = 200000000;

int main() {
   double r=0.0;
   clock_t start = clock();
   for(int i=0; i<num_tests; ++i)
       r += i;
   clock_t end = clock();
   std::cout << r << " empty loop took " << double(end-start)/CLOCKS_PER_SEC << "s\n";

   r=0;
   start = clock();
   for(int i=0; i<num_tests; ++i)
       r += i*double(FLT_RADIX);
   end = clock();
   std::cout << r << " multiplication loop took " << double(end-start)/CLOCKS_PER_SEC << "s\n";

   r=0;
   start = clock();
   for(int i=0; i<num_tests; ++i)
       r += scalbln(i, 1);
   end = clock();
   std::cout << r << " scalbln loop took " << double(end-start)/CLOCKS_PER_SEC << "s\n";

   return 0;
}