simple tic and toc

timer.hpp

#ifndef TIMER_H
#define TIMER_H

#include <chrono>
#include <thread>

using timer = std::chrono::high_resolution_clock::time_point;

inline void tic(timer &t){
    t = std::chrono::high_resolution_clock::now();
}

inline double toc(const timer &t){
    return (std::chrono::high_resolution_clock::now() - t).count()*1e-9;
}

inline void tic(timer *t){
    *t = std::chrono::high_resolution_clock::now();
}

inline double toc(const timer *t){
    return (std::chrono::high_resolution_clock::now() - *t).count()*1e-9;
}

inline void Sleep(int msec)
{
    std::this_thread::sleep_for(std::chrono::milliseconds(msec));
}

#endif // TIMER_H

The example usage code

#include <iostream>
#include "timer.hpp"

int main(int argc, char** argv){
    timer t;
    tic(t); // start timer
    std::cout << "test" << std::endl; 
    // some other activity to time
    double elased = toc(t); // measure elapsed time in seconds
    return 0;
}

for details http://en.cppreference.com/w/cpp/chrono