获取文件所在盘符剩余容量。
//获得文件所在盘符剩空间大小,单位GB
double GetDriveFreeSize(const char* strtemp)
{
char uuu[2] = { 0 };
uuu[0] = strtemp[0];
std::string firstchar = uuu;
std::string strRootPath = firstchar + ":\\";
/*CString strRootPath="E:\\123.txt";*///带根目录标记的磁盘符号
DWORD dwSectorsPerCluster = 0;//每簇中扇区数
DWORD dwBytesPerSector = 0;//每扇区中字节数
DWORD dwFreeClusters = 0;//剩余簇数
DWORD dwTotalClusters = 0;//总簇数
double m_dFree = 0.0;
if (GetDiskFreeSpace(strRootPath.c_str(), &dwSectorsPerCluster, &dwBytesPerSector,
&dwFreeClusters, &dwTotalClusters))
{
//m_dwVolSize=dwTotalClusters*dwSectorsPerCluster*dwBytesPerSector;//不能这样,否则越界
double dd = dwSectorsPerCluster * dwBytesPerSector / (1024.0 * 1024.0);
dd = dd / 1024.0;
m_dFree = dwFreeClusters * dd;//该磁盘剩余容量总大小
}
return m_dFree;
}
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