How to obtain precise time in milliseconds in C++?

9 months ago

Sophia Anderson

2 minutes

In C++, you can use std::chrono::high_resolution_clock from the header file to obtain time accurate to milliseconds. Here is a simple example code:

#include <iostream>
#include <chrono>

int main() {
    auto start = std::chrono::high_resolution_clock::now();
    
    // 这里放置需要测量时间的代码块
    
    auto end = std::chrono::high_resolution_clock::now();
    
    std::chrono::duration<double, std::milli> duration = end - start;
    
    std::cout << "Time taken: " << duration.count() << " milliseconds" << std::endl;
    
    return 0;
}

In the given example, high_resolution_clock::now() returns a time point, then calculates the difference between two time points, and finally converts the difference to milliseconds for output.