求助：编程练习时的错误（编译连接无问题，执行时无任何反应）
这个程序就是想把卷遍历一遍，输出相应信息。但是编译连接无问题，执行时无任何反应
#include<windows.h>
#include<iostream>
#define buflength 1024
using namespace std;
bool getdriveinfo(PCHAR szDRIVE)
{
UINT DriveType=GetDriveType(szDRIVE);
switch(DriveType)
{
case DRIVE_UNKNOWN:cout<<"The drive type cannot be determined."<<endl; break;
case DRIVE_NO_ROOT_DIR:cout<<"The root path is invalid; for example, there is no volume mounted at the specified path."<<endl;break;
case DRIVE_REMOVABLE:cout<<"The drive has removable media; for example, a floppy drive, thumb drive, or flash card reader."<<endl;break;
case DRIVE_FIXED:cout<<"The drive has fixed media; for example, a hard disk drive or flash drive."<<endl;break;
case DRIVE_REMOTE:cout<<"The drive is a remote (network) drive."<<endl;break;
case DRIVE_CDROM:cout<<"The drive is a CD-ROM drive."<<endl;break;
case DRIVE_RAMDISK:cout<<"The drive is a RAM disk."<<endl;
}
LPSTR lpVolumeNameBuf;
LPDWORD lpVolumeSerialNumber;
LPDWORD llpMaximumComponentLength;
LPDWORD lpFileSystemFlags;
LPSTR lpFileSystemNameBuf;
if(!GetVolumeInformation(szDRIVE,lpVolumeNameBuf,lstrlen(szDRIVE),lpVolumeSerialNumber,llpMaximumComponentLength,lpFileSystemFlags,lpFileSystemNameBuf,buflength))
{
return false;
}
cout<<"VolumeSerialNumber is :"<<lpVolumeSerialNumber<<endl;
cout<<"MaximumComponentLength is:"<<llpMaximumComponentLength<<endl;
cout<<"FileSystemFlags is:"<<lpFileSystemFlags<<endl;
cout<<"FileSystemNameBuf is"<<lpFileSystemNameBuf<<endl;
return true;
}
int WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR IpCmdLine,int nCmdShow)
{
CHAR lpBuf[buflength];
PCHAR DRIVE;
ZeroMemory(lpBuf,buflength);
GetLogicalDriveStrings(buflength,lpBuf);
DRIVE=(PCHAR)lpBuf;
while((DRIVE)!="\0x00")
{
if(!getdriveinfo(DRIVE))
{
cout<<"获取信息错误，错误代码："<<GetLastError()<<endl;
}
DRIVE+=(lstrlen(DRIVE)+1);
}
return 0;
}
谢谢各位了！
[解决办法]
下断点在程序main入口，单步执行，即可知结果。
[解决办法]
把代码书写规范之后，然后单步调试，自己动手，丰衣足食
[解决办法]
怎么看上去是死循环的样子？
这个if里面是不是应该加个break？
if(!getdriveinfo(DRIVE))
[解决办法]
全文都没个注释什么的，代码混乱！ 难怪出错不好找。
[解决办法]
单步调试和设断点调试是程序员必须掌握的技能之一。
[解决办法]
出现没反应的情况应该是函数【getdriveinfo】里面的那些指针没有初期化而导致的。
修改后得代码如下：
#include<windows.h>#include<iostream>#define buflength 1024using namespace std;bool getdriveinfo(PCHAR szDRIVE){ const int INFOBUF_SIZE=256; printf("%s\n", szDRIVE); UINT DriveType=GetDriveType(szDRIVE); switch(DriveType) { case DRIVE_UNKNOWN:cout<<"The drive type cannot be determined."<<endl; break; case DRIVE_NO_ROOT_DIR:cout<<"The root path is invalid; for example, there is no volume mounted at the specified path."<<endl;break; case DRIVE_REMOVABLE:cout<<"The drive has removable media; for example, a floppy drive, thumb drive, or flash card reader."<<endl;break; case DRIVE_FIXED:cout<<"The drive has fixed media; for example, a hard disk drive or flash drive."<<endl;break; case DRIVE_REMOTE:cout<<"The drive is a remote (network) drive."<<endl;break; case DRIVE_CDROM:cout<<"The drive is a CD-ROM drive."<<endl;break; case DRIVE_RAMDISK:cout<<"The drive is a RAM disk."<<endl; } // 这些指针都需要初始化 TCHAR volumeName[INFOBUF_SIZE]; LPSTR lpVolumeNameBuf = volumeName; LPDWORD lpVolumeSerialNumber = (LPDWORD)malloc(sizeof(DWORD) * 256); LPDWORD llpMaximumComponentLength = (LPDWORD)malloc(sizeof(DWORD) * 256); LPDWORD lpFileSystemFlags = (LPDWORD)malloc(sizeof(DWORD) * 256); LPSTR lpFileSystemNameBuf = (LPSTR)malloc(sizeof(TCHAR) * 256); if(!GetVolumeInformation(szDRIVE, lpVolumeNameBuf, INFOBUF_SIZE,lpVolumeSerialNumber,llpMaximumComponentLength,lpFileSystemFlags,lpFileSystemNameBuf,buflength)) { cout<< "false" << endl; return false; } cout<<"VolumeSerialNumber is :"<<lpVolumeSerialNumber<<endl; cout<<"MaximumComponentLength is:"<<llpMaximumComponentLength<<endl; cout<<"FileSystemFlags is:"<<lpFileSystemFlags<<endl; cout<<"FileSystemNameBuf is:"<<lpFileSystemNameBuf<<endl; return true;}int WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR IpCmdLine,int nCmdShow){ CHAR lpBuf[buflength]; PCHAR DRIVE; int count = 0; ZeroMemory(lpBuf,buflength); GetLogicalDriveStrings(buflength,lpBuf); DRIVE=(PCHAR)lpBuf; while((*DRIVE) != 0x00) { if(!getdriveinfo(DRIVE)) { cout<<"Error occurs when getting drive info\n Error code:"<<GetLastError()<<endl; } cout << endl; DRIVE += (lstrlen(DRIVE)+1); } return 0;}