c++ time nanoseconds

C++ Time in Nanoseconds

#include <iostream>
#include <chrono>

int main() {
    auto start = std::chrono::high_resolution_clock::now();

    // Perform some operation here

    auto end = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double, std::nano> duration = end - start;
    std::cout << "Time taken: " << duration.count() << " nanoseconds" << std::endl;

    return 0;
}

Explanation:

• Include Libraries: The #include directive is used to include the necessary libraries for the program. <iostream> is included for input and output operations, and <chrono> is included for time-related operations.

• Main Function: The main function is the entry point of the program where the execution begins.

• Start Time:std::chrono::high_resolution_clock::now() is used to obtain the current time as a starting point for measuring the duration of an operation.

• Perform Operation: This is where the actual operation to be measured for its duration would take place.

• End Time: Another call to std::chrono::high_resolution_clock::now() is made to obtain the current time after the operation has been performed.

• Calculate Duration: The duration between the start and end times is calculated using end - start. The result is stored in a std::chrono::duration object with a specified unit (std::nano for nanoseconds).

• Output Result: The duration is then printed to the standard output using std::cout. It is important to note that the count() function is used to obtain the duration in the desired unit (nanoseconds in this case).

• Return: Finally, the main function returns 0, indicating successful execution of the program.