現在時間を文字列として返す

#include <string>
#include <ctime>
#include <sstream>

enum TimeType{TIME_YEAR = 1, TIME_MON = 2, TIME_DAY = 4, TIME_HOUR = 8, TIME_MIN = 16, TIME_SEC = 32};

class TimeString
{
public:
	TimeString(void){}
	virtual ~TimeString(void){}

	///<summary>現在時間をstd::string型で返す</summary>
	static std::string NowTimeString(int timetype = TIME_YEAR + TIME_MON + TIME_DAY + TIME_HOUR + TIME_MIN + TIME_SEC){
		std::stringstream ss;
		std::time_t t = time(0);
		std::tm *x = localtime(&t);
		if(timetype & 1)  ss << x->tm_year + 1900; // TIME_YEAR
		if(timetype & 2)  ss << x->tm_mon + 1;     // TIME_MON
		if(timetype & 4)  ss << x->tm_mday;        // TIME_DAY
		if(timetype & 8)  ss << x->tm_hour;        // TIME_HOUR
		if(timetype & 16) ss << x->tm_min;         // TIME_MIN
		if(timetype & 32) ss << x->tm_sec;         // TIME_SEC
		return ss.str();
	}
};

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