C++ 将时间字符串转换为纪元的秒数

cpp
#include <IOStream>
#include <ctime>
int mAIn() {
    std::string timeStr = "2022-01-01 12:00:00";
    struct std::tm tm;
    std::istringstream ss(timeStr);
    ss >> std::get_time(&tm, "%Y-%m-%d %H:%M:%S");
    std::time_t epochTime = std::mktime(&tm);
    std::cout << "Epoch time: " << epochTime << std::endl;</p>    return 0;
}