linux c++ 时间

#include <iostream>
#include <ctime>

int main() {
    std::time_t now = std::time(nullptr);
    std::cout << "当前时间戳：" << now << std::endl;
    return 0;
}

#include <iostream>
#include <ctime>

int main() {
    std::time_t now = std::time(nullptr);
    std::tm *localTime = std::localtime(&now);
    char buffer[80];
    strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", localTime);
    std::cout << "当前时间：" << buffer << std::endl;
    return 0;
}

#include <iostream>
#include <ctime>

int main() {
    std::time_t now = std::time(nullptr);
    std::tm *localTime = std::localtime(&now);
    std::cout << "年：" << (localTime->tm_year + 1900) << std::endl;
    std::cout << "月：" << (localTime->tm_mon + 1) << std::endl;
    std::cout << "日：" << localTime->tm_mday << std::endl;
    std::cout << "时：" << localTime->tm_hour << std::endl;
    std::cout << "分：" << localTime->tm_min << std::endl;
    std::cout << "秒：" << localTime->tm_sec << std::endl;
    return 0;
}

#include <iostream>
#include <chrono>

int main() {
    auto now = std::chrono::high_resolution_clock::now();
    auto duration = now.time_since_epoch();
    auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();
    std::cout << "当前时间戳（毫秒）：" << millis << std::endl;
    return 0;
}