C++ 获取磁盘盘符以及剩余空间

超、凢脫俗 2021-11-02 14:52 1220阅读 0赞

void test2()
    { 
        DWORD dwLen = GetLogicalDriveStrings(0, NULL);	//获取系统字符串长度.
        char * pszDriver = new char[dwLen];				//构建一个相应长度的数组.
        GetLogicalDriveStrings(dwLen, pszDriver);		//获取盘符字符串.
        vector<string> v;
        while (*pszDriver != '\0')
        { 
            cout << pszDriver << " ---- " << endl;
            v.push_back(pszDriver);
            pszDriver += strlen(pszDriver) + 1;			//定位到下一个字符串.加一是为了跳过'\0'字符串.
        }
    
        int DType;
        int si = 0;
        BOOL fResult;
        unsigned _int64 i64FreeBytesToCaller;
        unsigned _int64 i64TotalBytes;
        unsigned _int64 i64FreeBytes;
    
        for (int i = 0; i < dwLen / 4; ++i)
            //为了显示每个驱动器的状态，则通过循环输出实现，由于DStr内部保存的数据是A:\NULLB:\NULLC:\NULL，这样的信息，所以DSLength/4可以获得具体大循环范围
        { 
            DType = GetDriveType(v[i].c_str());
            //GetDriveType函数，可以获取驱动器类型，参数为驱动器的根目录
            if (DType == DRIVE_FIXED)
            { 
                cout << "硬盘";
            }
            else if (DType == DRIVE_CDROM)
            { 
                cout << "光驱";
            }
            else if (DType == DRIVE_REMOVABLE)
            { 
                cout << "可移动式磁盘";
            }
            else if (DType == DRIVE_REMOTE)
            { 
                cout << "网络磁盘";
            }
            else if (DType == DRIVE_RAMDISK)
            { 
                cout << "虚拟RAM磁盘";
            }
            else if (DType == DRIVE_UNKNOWN)
            { 
                cout << "未知设备";
            }
    
            fResult = GetDiskFreeSpaceEx(
                v[i].c_str(),
                (PULARGE_INTEGER)&i64FreeBytesToCaller,
                (PULARGE_INTEGER)&i64TotalBytes,
                (PULARGE_INTEGER)&i64FreeBytes);
            //GetDiskFreeSpaceEx函数，可以获取驱动器磁盘的空间状态,函数返回的是个BOOL类型数据
            if (fResult)//通过返回的BOOL数据判断驱动器是否在工作状态
            { 
                cout << " totalspace:" << (float)i64TotalBytes / 1024 / 1024 << " MB";//磁盘总容量
                cout << " freespace:" << (float)i64FreeBytesToCaller / 1024 / 1024 << " MB";//磁盘剩余空间
            }
            else
            { 
                cout << " 设备未准备好";
            }
            cout << endl;
            si += 4;
        }
    }