C + + obtains logical disk details through the WIN32 API

1#include <iostream>2#include <windows.h>3 using namespacestd; 4 5 intMain ()6 {7      intDiskcount =0;8DWORD DiskInfo =getlogicaldrives ();9      //The getlogicaldrives () function is used to obtain the number of logical drives in the system, and the function returns a 32-bit unsigned integer data. Ten       while(DiskInfo)//The loop operation is to see if each bit of data is 1, if 1 the disk is true and if 0 the disk does not exist.  One      { A          if(diskinfo&1)//by the logic and operation of the bitwise operation, it is judged whether it is 1 -          { -++Diskcount; the          } -DiskInfo = DiskInfo >>1;//The right-shift operation of the bitwise operation guarantees that each loop is checked to the right by one position at a time.  -          //diskinfo = DISKINFO/2; -      } +cout<<"Number of logical disks:"<<DiskCount<<Endl; - //------------------------------------------------------------------- +  A       intDslength = GetLogicalDriveStrings (0, NULL); at      //gets the length of all drive string information through the GetLogicalDriveStrings () function.  -      Char* Dstr =New Char[Dslength];//creates a C-style string array in the heap area with the obtained length - getlogicaldrivestrings (Dslength, (LPTSTR) dstr); -      //The string information is copied to the heap array through getlogicaldrivestrings, where information about all the drives is saved.  -  -      intDType; in      intSi=0; - BOOL Fresult; to unsigned _int64 i64freebytestocaller; + unsigned _int64 i64totalbytes; - unsigned _int64 i64freebytes; the  *        for(intI=0; i<dslength/4;++i) $      //in order to show the status of each drive, it is implemented through the loop output, because the data stored inside the DSTR is a:\nullb:\nullc:\null, so DSLENGTH/4 can obtain a specific cycle rangePanax Notoginseng      { -          Chardir[3]={dstr[si],':','\\'}; thecout<<dir; +DType = GetDriveType (dstr+i*4); A          //getdrivetype function, you can get the drive type, the parameter is the root directory of the drive the          if(DType = =drive_fixed) +          { -cout<<"HDD"; $          } $          Else if(DType = =drive_cdrom) -          { -cout<<"Optical Drive"; the          } -          Else if(DType = =drive_removable)Wuyi          { thecout<<"Removable disk"; -          } Wu          Else if(DType = =drive_remote) -          { Aboutcout<<"Network Disk"; $          } -          Else if(DType = =Drive_ramdisk) -          { -cout<<"Virtual RAM Disk"; A          } +          Else if(DType = =Drive_unknown) the          { -cout<<"Unknown Device"; $          } the  theFresult =GetDiskFreeSpaceEx ( the dir, the(Pularge_integer) &I64freebytestocaller, -(Pularge_integer) &I64totalbytes, in(Pularge_integer) &i64freebytes); the          //The GetDiskFreeSpaceEx function can get the space state of the drive disk, and the function returns a bool type of data the          if(Fresult)//determines whether the drive is in a working state by returning the BOOL data About          { thecout<<"Totalspace:"<< (float) i64totalbytes/1024x768/1024x768<<"MB";//Total disk Capacity thecout<<"FreeSpace:"<< (float) i64freebytestocaller/1024x768/1024x768<<"MB";//disk space remaining the          } +          Else -          { thecout<<"The device is not ready.";Bayi          } thecout<<Endl; thesi+=4; -      } -  theSystem"Pause"); the } theThe WIN API functions as a programming interface in the Windows operating system environment, in other languages, such as VB vb.net C # Delphi in the use of the method of operation is similar, specific reference to the relevant language books.

C + + obtains logical disk details through the WIN32 API