std::chrono计算不同比率下的差值

#include <iostream>
#include <chrono>

int main() {
    // 获取当前时间点
    auto start = std::chrono::high_resolution_clock::now();

    // 执行一些操作

    // 获取当前时间点
    auto end = std::chrono::high_resolution_clock::now();

    // 计算时间间隔
    auto duration = end - start;

    // 输出时间间隔
    std::cout << "时间间隔为：" << std::chrono::duration_cast<std::chrono::seconds>(duration).count() << " 秒" << std::endl;
    std::cout << "时间间隔为：" << std::chrono::duration_cast<std::chrono::milliseconds>(duration).count() << " 毫秒" << std::endl;
    std::cout << "时间间隔为：" << std::chrono::duration_cast<std::chrono::microseconds>(duration).count() << " 微秒" << std::endl;
    std::cout << "时间间隔为：" << std::chrono::duration_cast<std::chrono::nanoseconds>(duration).count() << " 纳秒" << std::endl;

    return 0;
}