在C/C++中在本地时间和GMT/UTC之间转换

#include<iostream>
#include <ctime>

int main() {
    std::time_t now = std::time(0);
    std::tm *local = std::localtime(&now);
    std::tm *gmt = std::gmtime(&now);

    std::cout << "Local time: "<< std::asctime(local)<< std::endl;
    std::cout << "GMT/UTC: "<< std::asctime(gmt)<< std::endl;

    return 0;
}