一个磁盘用于动态存储文件，保持最新文件存储，删除较早文件释放磁盘空间

BOOL fResult;
unsigned _int64 i64FreeBytesToCaller;
unsigned _int64 i64TotalBytes;
unsigned _int64 i64FreeBytes;
unsigned int freespace;
vector<char *> myFileVector;

fResult = GetDiskFreeSpaceEx ("D://",(PULARGE_INTEGER)&i64FreeBytesToCaller,(PULARGE_INTEGER)&i64TotalBytes,(PULARGE_INTEGER)&i64FreeBytes);
if(fResult)
{freespace = i64FreeBytesToCaller/1024/1024/1024;if (freespace < 30){vector<char *> myFileVector;TCHAR   path[200]; SetCurrentDirectory("D:\\");GetCurrentDirectory(200,path); CFileFind finder;BOOL bWorking = finder.FindFile("*.*");while (bWorking){bWorking = finder.FindNextFile();CString filename= finder.GetFileName();if(filename == "." || filename == ".."||\filename == "RECYCLER" || filename == "System Volume Information"){//………………  }else if(finder.IsDirectory()){char chtemp[16];sprintf(chtemp,"%s",filename);myFileVector.push_back(chtemp);}}//End while bWorkingif(myFileVector.size() > 0){sort(myFileVector);}//int a= myFileVector.size();CString strdeletefile;while(freespace < 30){                     if(myFileVector.size()  > 0){strdeletefile.Format("%s",myFileVector.at(0));myFileVector.erase(&myFileVector[0]);DeleteDirectory(strdeletefile);// 调用删除文件(strdeletfile是文件夹名)fResult = GetDiskFreeSpaceEx ("D://",(PULARGE_INTEGER)&i64FreeBytesToCaller,(PULARGE_INTEGER)&i64TotalBytes,(PULARGE_INTEGER)&i64FreeBytes);}else{break;}if(fResult){freespace = i64FreeBytesToCaller/1024/1024/1024;}else{break;}}//End while freespace}//End if freespace
}//End if fResult

//得到磁盘剩余空间大小，得到文件夹名，文件夹名为日期格式，如20120701125900《2012年7月1日12时59分00秒》