#include <iostream>
#include <ctime>

using namespace std;

int main(int argc, const char * argv[]) {
    
    clock_t begin = clock();
    
    //code
    
    clock_t end = clock();
    double t = static_cast<double>(end - begin) / CLOCKS_PER_SEC;
    cout << t << endl;
    return 0;
}

#include <chrono>

template<typename TimeT = std::chrono::milliseconds>
struct measure
{
    template<typename F, typename ...Args>
    static typename TimeT::rep execution(F func, Args&&... args)
    {
        auto start = std::chrono::system_clock::now();

        // Now call the function with all the parameters you need.
        func(std::forward<Args>(args)...);

        auto duration = std::chrono::duration_cast< TimeT>
            (std::chrono::system_clock::now() - start);

        return duration.count();
    }
};

struct functor
{
    int state;
    functor(int state) : state(state) {}
    void operator()() const
    {
        std::cout << "In functor run for ";
    }
};

void func()
{
    std::cout << "In function, run for " << std::endl;
}

int main() 
{
    // codes directly
    std::cout << measure<>::execution([&]() {
        // your code
    }) << " ms" << std::endl;

    // functor
    std::cout << measure<>::execution(functor(3)) << std::endl;

    // function
    std::cout << measure<>::execution(func);
}