Convert Date to char array
char buff[100];
if(ptm->tm_mon < 10){
if(ptm->tm_mday < 10){
sprintf(buff,"%u-0%u-0%u",(unsigned)ptm->tm_year,(unsigned)ptm->tm_mon,(unsigned)ptm->tm_mday);
}else{
sprintf(buff,"%u-0%u%u",(unsigned)ptm->tm_year,(unsigned)ptm->tm_mon,(unsigned)ptm->tm_mday);
}
}else{
if(ptm->tm_mday < 10){
sprintf(buff,"%u-%u-0%u",(unsigned)ptm->tm_year,(unsigned)ptm->tm_mon,(unsigned)ptm->tm_mday);
}else{
sprintf(buff,"%u-%u-%u",(unsigned)ptm->tm_year,(unsigned)ptm->tm_mon,(unsigned)ptm->tm_mday);
}
}