Timing function C++11

functionTiming.cpp

#include <iostream>
#include <cmath>
#include <iomanip>
#include <chrono>

int fun(const int a, const int b, const int c) {
  return a * b * c;
}

int main(int argc, const char * argv[]) {
  for (int i = 0; i < 101; i++) {
        float x = static_cast<float>(i) / 100.f;
        auto start = std::chrono::steady_clock::now();
        auto t1    = fun(i, i * 5, i * 10);
        auto end   = std::chrono::steady_clock::now();

        std::cout << "T1 -> " << std::chrono::duration <double, std::nano> (end - start).count();
    }
}