linux下c++实现string与time_t互相转换

#include 
#include 
#include 
using namespace std;

time_t string2time_t(const string string_time);
string time_t2string(const time_t time_t_time);
int main()
{
    string strTime = "2014/03/28 18:25:26";
    time_t time1 = string2time_t(strTime);
    cout<tm_year += 1900;
    pTm->tm_mon +=1;

    sprintf_s(szTime, "%04d/%02d/%02d %02d:%02d:%02d",
        pTm->tm_year,
        pTm->tm_mon,
        pTm->tm_mday,
        pTm->tm_hour,
        pTm->tm_min,
        pTm->tm_sec);

    string strTime = szTime;

    delete pTm;
    pTm = NULL;

    return strTime;
}

string get_time()
{
	string timeStr;
	//time_t t = time(0);
	time_t t = time(NULL);
	char tmp[64];
	strftime( tmp, sizeof(tmp), "%Y-%m-%d %X ",localtime(&t) );// 2017-05-16 17:00:00
 
	timeStr = tmp;
	return timeStr;
}

time_t convert_string_to_time_t(const std::string & time_string)
{
	struct tm tm1;
	time_t time1;
	sscanf(time_string.c_str(), "%d-%d-%d %d:%d:%d" ,
				&(tm1.tm_year),
				&(tm1.tm_mon),
				&(tm1.tm_mday),
				&(tm1.tm_hour),
				&(tm1.tm_min),
				&(tm1.tm_sec));
 
	tm1.tm_year -= 1900;
	tm1.tm_mon --;
	tm1.tm_isdst=-1;
	time1 = mktime(&tm1);
 
	return time1;
}