获取时间

time_t timep;
time(&timep);
struct tm *localt=localtime(&timep);
int year=localt->tm_year+1900;
int month=localt->tm_mon+1;
int day=localt->tm_mday;
int hour=localt->tm_hour;
int min=localt->tm_min;
int sec=localt->tm_sec;

char preTime[40];
sprintf(preTime,"上次登陆时间%d/%d/%d/%d:%d:%d\n",year,month,day,hour,min,sec);

//结果输出到prerTime