cocos2d-x下獲取系統的當前時間
struct tm *tm;
time_t timep;
time(&timep);
tm = localtime(&timep);
int year = tm->tm_year + 1900;
int month = tm->tm_mon + 1;
int day = tm->tm_mday;
int hour = tm->tm_hour;
int minute = tm->tm_min;
int second = tm->tm_sec;
log("%d-%d-%d-%d-%d-%d", year, month, day, hour, minute, second);
//2014-1-18-20-7-9