C++将时间字符串转换为纪元的秒数

#include <iostream>
#include <ctime>
#include <sstream>

int main() {
    std::string timeString = "2022-01-01 00:00:00";
    
    std::tm timeStruct = {};
    std::istringstream iss(timeString);
    iss >> std::get_time(&timeStruct, "%Y-%m-%d %H:%M:%S");
    
    std::time_t epochSeconds = std::mktime(&timeStruct);
    
    std::cout << "Epoch seconds: " << epochSeconds << std::endl;
    
    return 0;
}