【C++】Linux下计算特定日期与纪元日期差值（秒）

文章中的文字可能存在语法错误以及标点错误，请谅解；

如果在文章中发现代码错误或其它问题请告知，感谢！

#include
#include 

using namespace std;

struct MarkTime {  
    uint32_t year;
	uint32_t month;
	uint32_t day;
	uint32_t hour;
	uint32_t minute;
	uint32_t second;
};

int main(){
	auto get_current_seconds = []{
		auto sys_clock = std::chrono::time_point_cast(std::chrono::system_clock::now());
		auto seconds = std::chrono::duration_cast(sys_clock.time_since_epoch());

		return seconds.count();
    };
	
	auto get_mark_time_seconds = [] (MarkTime time) {
		std::tm mark_time = {0};
		mark_time.tm_year = time.year - 1900;
		mark_time.tm_mon = time.month - 1;
		mark_time.tm_mday = time.day;
		mark_time.tm_hour = time.hour - 1;
		mark_time.tm_min = time.minute;
		mark_time.tm_sec = time.second;
		
		auto tp = std::chrono::system_clock::from_time_t(std::mktime(&mark_time));
		auto converted_mark_time = std::chrono::time_point_cast(tp);
		auto seconds = std::chrono::duration_cast(converted_mark_time.time_since_epoch());

		std::chrono::time_point stampTime(seconds);
		std::time_t tmStampTime = std::chrono::system_clock::to_time_t(stampTime);
		std::cout << "setting time: " << std::ctime(&tmStampTime) << std::endl;			//设置时间
			
		return seconds.count();
	};
	
	MarkTime SettingMarkTime = {2021, 10, 31, 1, 1, 1};									//设置的年月日时分
	
	auto epoch_time = std::chrono::system_clock::to_time_t(std::chrono::time_point{});
    std::cout << "epoch: " << std::ctime(&epoch_time) << std::endl;						//纪元时间
	
	auto today_time = std::chrono::system_clock::to_time_t(std::chrono::system_clock::now());
	std::cout << "today: " << std::ctime(&today_time) << std::endl;						//系统当前时间
	
	auto mark_time = get_mark_time_seconds(SettingMarkTime);	
	std::cout << "settint time to epoch: " << mark_time  << "seconds" << std::endl; 	//设置时间距纪元时间（秒）
	
	auto system_time =  get_current_seconds();											//系统当前时间距纪元时间（秒）
	std::cout << "today to epoch: " << system_time << "seconds" << std::endl;					
	
	return 0;
}

运行结果：

以上。