chrono_timer/computing_sum.cpp at master · koryca/chrono_timer

Repository navigation

// chrono_timer: simple example showing how to use the std::chrono library

// to do elapsed time measurement

// usage:

// chrono_timer [secs]

#include <iostream>

#include <chrono>

#include <unistd.h>

int

main (int ac, char *av[])

{

unsigned long long iteration = 0, sum = 0;

if (ac > 1) // if user entered a value after the prog name, parse it

iteration = std::atoi(av[1]);

std::chrono::time_point<std::chrono::high_resolution_clock> start_time = std::chrono::high_resolution_clock::now();

for(unsigned long long i=0; i<iteration;i++){

sum += i;

}

std::chrono::time_point<std::chrono::high_resolution_clock> end_time = std::chrono::high_resolution_clock::now();

std::chrono::duration<double> elapsed = end_time - start_time;

std::cout << " Elapsed time is : " << elapsed.count() << " sum of " << iteration << " iteration is " << sum << std::endl;

return 0;

}