¿Cómo mostrar por pantalla el tiempo transcurrido en unity?

#include <iostream>
#include <chrono>
#include <thread>

int main()
{
    using namespace std::this_thread; // sleep_for, sleep_until
    using namespace std::chrono; // nanoseconds, system_clock, seconds

    auto start = std::chrono::system_clock::now();
    sleep_for(std::chrono::seconds(1));

    auto end = std::chrono::system_clock::now();
    std::chrono::duration<double> elapsed_seconds = end-start;
    std::time_t end_time = std::chrono::system_clock::to_time_t(end);

    std::cout << "finished computation at " << std::ctime(&end_time)
              << "elapsed time: " << elapsed_seconds.count() << "s\n";
}