如何从Windows使用C获得可用磁盘空间？

Question

我有1个磁盘分成多个分区。我想获得每个分区上的可用空间，以确定最佳放置文件的位置。

如何在C中做到这一点？

我一直在尝试使用此代码：

__int64 lpFreeBytesAvailable, lpTotalNumberOfBytes, lpTotalNumberOfFreeBytes; 
DWORD dwSectPerClust, dwBytesPerSect, dwFreeClusters, dwTotalClusters; 

test = GetDiskFreeSpaceEx(
     pszDrive, 
     (PULARGE_INTEGER)&lpFreeBytesAvailable, 
     (PULARGE_INTEGER)&lpTotalNumberOfBytes, 
     (PULARGE_INTEGER)&lpTotalNumberOfFreeBytes 
     ); 

但结果是不正确的。

任何想法？

感谢

Answer 1

能正常工作对我来说：

void main (int argc, wchar_t **argv) 
    { 
     BOOL fResult; 
     unsigned __int64 i64FreeBytesToCaller, 
         i64TotalBytes, 
         i64FreeBytes; 
     fResult = GetDiskFreeSpaceEx (L"C:", 
           (PULARGE_INTEGER)&i64FreeBytesToCaller, 
           (PULARGE_INTEGER)&i64TotalBytes, 
           (PULARGE_INTEGER)&i64FreeBytes); 
     if (fResult) 
     { 
      printf ("\n\nGetDiskFreeSpaceEx reports\n\n"); 
      printf ("Available space to caller = %I64u MB\n", 
        i64FreeBytesToCaller/(1024*1024)); 
      printf ("Total space    = %I64u MB\n", 
        i64TotalBytes/(1024*1024)); 
      printf ("Free space on drive  = %I64u MB\n", 
        i64FreeBytes/(1024*1024)); 
     } 
    }