时间处理函数

	time_t dwtime1 = time(0);

	struct tm *plocal1= localtime(&dwtime1);

	char *pctime1 = ctime(&dwtime1);

	time_t dwtime2 = mktime(plocal1);

	char szftime1[128] = {0};
	char szftime2[128] = {0};
	strftime(szftime1, 128, "%Y-%m-%d %H:%M:%S", plocal1);
	strftime(szftime2, 128, "%x %X", plocal1);

	time_t dwtime3 = time(0);

	double ddiftime = difftime(dwtime3, dwtime1);

	cout << "dwtime1 = " << dwtime1 << endl;
	cout << "pctime1 = " << pctime1 << endl;
	cout << "dwtime2 = " << dwtime2 << endl;
	cout << "szftime1 = " << szftime1 << endl;
	cout << "szftime2 = " << szftime2 << endl;
	cout << "dwtime3 = " << dwtime3 << endl;
	cout << "ddiftime = " << ddiftime << endl;

输出结果:

dwtime1 = 1395976670
pctime1 = Fri Mar 28 11:17:50 2014
dwtime2 = 1395976670
szftime1 = 2014-03-28 11:17:50
szftime2 = 03/28/14 11:17:50
dwtime3 = 1395976674
ddiftime = 4

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