Question

How should I find the execution time of a program in c++?

Answer 1

The function clock() returns the number of clock ticks since the program started executing. If you divide it by the constant CLOCKS_PER_SEC you will get how long the program has been running, in seconds.

Answer 2

C++ way:

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

int main()
{
    using clock = std::chrono::steady_clock;
    clock::time_point start = clock::now();
    std::this_thread::sleep_for(std::chrono::seconds(5));
    clock::time_point end = clock::now();
    clock::duration execution_time = end - start;
    std::cout << std::chrono::duration_cast<std::chrono::milliseconds>(execution_time).count() << std::endl;
}

Comments

I tried using that way as you advised, but I am getting errors. I don't know how to fix. I have never done execution time in my code. can you please help me? Thank you.
Here is the code:
https://onlinegdb.com/kkX2X1Lb9

---

#include <chrono>

Add this

---

okay, I added that library, but still I don't get the execution time of my program

---

I've updated my original answer to include printing the duration converted to milliseconds. I hope this helps.