#include <iostream>
#include <chrono>
int main() {
    // 定義一個(gè)表示 5 秒的時(shí)間段
    std::chrono::duration<int> fiveSeconds(5);
    std::cout << "Five seconds is " << fiveSeconds.count() << " seconds." << std::endl;
    return 0;
}

using nanoseconds  = duration</* signed integer type of at least 64 bits */, nano>;
using microseconds = duration</* signed integer type of at least 55 bits */, micro>;
using milliseconds = duration</* signed integer type of at least 45 bits */, milli>;
using seconds      = duration</* signed integer type of at least 35 bits */>;
using minutes      = duration</* signed integer type of at least 29 bits */, ratio<  60>>;
using hours        = duration</* signed integer type of at least 23 bits */, ratio<3600>>;

#include <iostream>
#include <chrono>
int main() {
    // 定義一個(gè)表示 2 小時(shí)的時(shí)間段
    std::chrono::hours twoHours(2);
    // 將 2 小時(shí)轉(zhuǎn)換為分鐘
    std::chrono::minutes minutesInTwoHours = std::chrono::duration_cast<std::chrono::minutes>(twoHours);
    std::cout << "Two hours is " << minutesInTwoHours.count() << " minutes." << std::endl;
    return 0;
}

#include <iostream>
#include <chrono>
int main() {
    std::chrono::seconds fiveSeconds(5);
    std::chrono::seconds threeSeconds(3);
    // 加法運(yùn)算
    std::chrono::seconds eightSeconds = fiveSeconds + threeSeconds;
    std::cout << "Five seconds + three seconds = " << eightSeconds.count() << " seconds." << std::endl;
    // 減法運(yùn)算
    std::chrono::seconds twoSeconds = fiveSeconds - threeSeconds;
    std::cout << "Five seconds - three seconds = " << twoSeconds.count() << " seconds." << std::endl;
    // 乘法運(yùn)算
    std::chrono::seconds tenSeconds = fiveSeconds * 2;
    std::cout << "Five seconds * 2 = " << tenSeconds.count() << " seconds." << std::endl;
    // 除法運(yùn)算
    std::chrono::seconds halfFiveSeconds = fiveSeconds / 2;
    std::cout << "Five seconds / 2 = " << halfFiveSeconds.count() << " seconds." << std::endl;
    return 0;
}

#include <iostream>
#include <chrono>
int main() {
    // 獲取當(dāng)前時(shí)間點(diǎn)
    std::chrono::time_point<std::chrono::system_clock> now = std::chrono::system_clock::now();
    std::cout << "Current time point: " << std::chrono::system_clock::to_time_t(now) << std::endl;
    return 0;
}

#include <iostream>
#include <chrono>
#include <thread>
int main() {
    std::chrono::time_point<std::chrono::system_clock> start = std::chrono::system_clock::now();
    // 模擬一些耗時(shí)操作
    std::this_thread::sleep_for(std::chrono::seconds(2));
    std::chrono::time_point<std::chrono::system_clock> end = std::chrono::system_clock::now();
    // 計(jì)算兩個(gè)時(shí)間點(diǎn)之間的時(shí)間段
    std::chrono::duration<double> elapsed_seconds = end - start;
    std::cout << "Elapsed time: " << elapsed_seconds.count() << " seconds." << std::endl;
    return 0;
}

#include <iostream>
#include <chrono>
#include <ctime>
int main() {
    std::chrono::time_point<std::chrono::system_clock> now = std::chrono::system_clock::now();
    std::time_t now_c = std::chrono::system_clock::to_time_t(now);
    std::cout << "Current time: " << std::ctime(&now_c);
    return 0;
}

#include <iostream>
#include <chrono>
#include <thread>
int main() {
    std::chrono::time_point<std::chrono::steady_clock> start = std::chrono::steady_clock::now();
    // 模擬一些耗時(shí)操作
    std::this_thread::sleep_for(std::chrono::seconds(2));
    std::chrono::time_point<std::chrono::steady_clock> end = std::chrono::steady_clock::now();
    std::chrono::duration<double> elapsed_seconds = end - start;
    std::cout << "Elapsed time: " << elapsed_seconds.count() << " seconds." << std::endl;
    return 0;
}

#include <iostream>
#include <chrono>
int main() {
    std::chrono::time_point<std::chrono::high_resolution_clock> start = std::chrono::high_resolution_clock::now();
    // 執(zhí)行一些操作
    for (int i = 0; i < 1000000; ++i) {
        // do something
    }
    std::chrono::time_point<std::chrono::high_resolution_clock> end = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double> elapsed_seconds = end - start;
    std::cout << "Elapsed time: " << elapsed_seconds.count() << " seconds." << std::endl;
    return 0;
}

#include <iostream>
#include <chrono>
#include <vector>
void fillVector(std::vector<int>& vec, int size) {
    for (int i = 0; i < size; ++i) {
        vec.push_back(i);
    }
}
int main() {
    std::vector<int> myVector;
    std::chrono::time_point<std::chrono::steady_clock> start = std::chrono::steady_clock::now();
    fillVector(myVector, 1000000);
    std::chrono::time_point<std::chrono::steady_clock> end = std::chrono::steady_clock::now();
    std::chrono::duration<double> elapsed_seconds = end - start;
    std::cout << "Time to fill vector: " << elapsed_seconds.count() << " seconds." << std::endl;
    return 0;
}

#include <iostream>
#include <chrono>
#include <thread>
int main() {
    // 定義一個(gè) 5 秒后的時(shí)間點(diǎn)
    std::chrono::time_point<std::chrono::steady_clock> futureTime = std::chrono::steady_clock::now() + std::chrono::seconds(5);
    std::cout << "Waiting for 5 seconds..." << std::endl;
    std::this_thread::sleep_until(futureTime);
    std::cout << "5 seconds have passed." << std::endl;
    return 0;
}