怎么老是LINK2001错误？？

Question

在 MFC对话框类 CmyDlg 中添加类 EMatch 的头文件 
# include "EMatch.h"
# include "EMatch.h"  class CmyDlg: public CDialog
{  public: 
  
   EMatch  * p ;      
   EMatch  m_a  ; //这里老是报LINK 2001 错误 
error LNK2001: 无法解析的外部符号 "__declspec(dllimport) public:  __thiscall EMatch::EMatch(void)" (__imp_??0EMatch@@QAE@XZ) myDlg.obj
       };定义指针没问题，定义对象就报错，类EMatch 中有构造函数很析构函数啊！  大侠指点下这个怎么回事啊？？

Answer 1

EMatch是什么?你连接他的lib文件了吗?

Answer 2

EMatch 是个封装了类的头文件，lib库已经加了！在工具选项里加了！ 

Answer 3

这个已经加了 #include EMatch 

Answer 4

看看构造函数的定义，__declspec(dllimport) __thiscall等是否都符合
lib有没有加入？

Answer 5

据我估计你是没有实现EMatch的构造函数
只定义，没实现

Answer 6

其实这个是第三方库的头文件，已经加了，lib在工具选项里也加了！ 
在BCB里这样用没问题啊！ 

Answer 7

这个是第三方的库头文件， 以前在BCB里可以用，现在是VS2008 ！ 下面是EMatch 的头文件，大侠帮忙看下，没有改过的。第三方的！#ifndef __EMATCH_H__
#define __EMATCH_H__// ---------------------------------------------------------------------------
#include "Easy.h"
#include "EMatch_Enum.h"#include "EasyMatch_BinaryCompatible.h"// ---------------------------------------------------------------------------// ---------------------------------------------------------------------------#if defined E_BC45  // Forward declarations of class instances
  template<class Type> class EVectorTemplate;
  class EVectorTemplate<EMatchPosition>;#elif defined E_BC50 || defined E_BCB  // Forward declarations of class instances
  template<class Type> class EVectorTemplate;
  template class E_DLL1 EVectorTemplate<EMatchPosition>;#endifclass E_DLL1 EMatchPositionsVector : public EVectorTemplate<EMatchPosition>
{
  // Wrapping members
public:
  int handle_;
  FinalizeCallback callback_;public:
  E_DLL0 CONSTRUCTOR E_DLL1  EMatchPositionsVector( UINT32 un32MaxPositions);
};// ---------------------------------------------------------------------------// Maximum neighborhood size
#define RADIUS_MAX        4
#define DIAMETER_MAX      ( 2 * RADIUS_MAX + 1)// Must be smaller than any correlation value
#define MINUS_INFINITY  -2.f// ---------------------------------------------------------------------------// Pattern class ( manages the pattern geometric transform during matching
struct EPatternRun
{
  // Offset coordinates of the run starting point
  INT32 m_n32OffsetX;
  INT32 m_n32OffsetY;  // Length of the run
  INT32 m_n32Length;  // Run limiting pointers in the source or transformed areas
  UINT8 *m_pun8PatBeg;
  UINT8 *m_pun8PatEnd;
};// ---------------------------------------------------------------------------
struct EImagePattern
{
  EPatternRun* m_pRuns;
  
  INT32 m_n32NumRuns;  INT64 m_n64PatPatSigma;
  INT64 m_n64PatPatSum;  FLOAT32 m_f32AreaRatio;
};
class EPattern
{
public:
  E_DLL0 CONSTRUCTOR E_DLL1   EPattern            ( );
  virtual E_DLL0 DESTRUCTOR E_DLL1  ~EPattern     ( );  E_DLL0 FLOAT32 E_DLL1       Correlate           ( INT32 n32X, INT32 n32Y, FLOAT32& f32AreaRatio);
  E_DLL0 void E_DLL1          SetPattern          ( EGenericROI* pPattern, UINT32 un32PatExtension = 0);
  E_DLL0 void E_DLL1          SetImage            ( EGenericROI* pImage);
  E_DLL0 void E_DLL1          SetupRuns           ( );
  E_DLL0 void E_DLL1          SetupRuns           ( 
                                                    FLOAT32 f32SrcX,
                                                    FLOAT32 f32SrcY,
                                                    FLOAT32 f32DstX,
                                                    FLOAT32 f32DstY,
                                                    FLOAT32 f32Angle = 0.f,
                                                    FLOAT32 f32ScaleX = 1.f,
                                                    FLOAT32 f32ScaleY = 1.f,
                                                    FLOAT32 f32PixelWidth = 1.f,
                                                    FLOAT32 f32PixelHeight = 1.f);
  
  // Compute and store the direct transform coefficients
  E_DLL0 void E_DLL1          SetTransform        ( 
                                                    FLOAT32 f32SrcX,
                                                    FLOAT32 f32SrcY,
                                                    FLOAT32 f32DstX,
                                                    FLOAT32 f32DstY,
                                                    FLOAT32 f32Angle = 0.f,
                                                    FLOAT32 f32ScaleX = 1.f,
                                                    FLOAT32 f32ScaleY = 1.f,
                                                    FLOAT32 f32PixelWidth = 1.f,
                                                    FLOAT32 f32PixelHeight = 1.f);
  
  // Store the direct transform coefficients
  E_DLL0 void E_DLL1          SetTransformMatrix  ( 
                                                    FLOAT32 f32Axx, FLOAT32 f32Axy, FLOAT32 f32Ax,
                                                    FLOAT32 f32Ayx, FLOAT32 f32Ayy, FLOAT32 f32Ay);
  
  // Debugging utilities
  E_DLL0 void E_DLL1          Copy                ( EGenericROI* pDst);  // Match Extension
  E_DLL0 void E_DLL1          SetExtension(INT32 n32ExtensionX, INT32 n32ExtensionY);protected:
  //void ClipPatternForAllPositions();
  //void ClearClippedPatterns();
  
protected:
// Reference pattern description
//------------------------------
  EGenericROI                 *m_pPat; // current pattern
                              
  // Pattern parameters       
  UINT32                      m_un32PatWidth;
  UINT32                      m_un32PatHeight;
  UINT32                      m_un32ExtPatWidth;
  UINT32                      m_un32ExtPatHeight;
  UINT32                      m_un32PatRowPitch;
  UINT32                      m_un32PatExtension;
  UINT8                       *m_pun8Pat; // address of first pixel
  
  // Pattern Size, unreduced.
  INT32                       m_n32PatternWidth;
  INT32                       m_n32PatternHeight;
  
// Image to be searched description
//---------------------------------
  EGenericROI                 *m_pImg; // store the search field
                              
  // Image parameters         
  UINT32                      m_un32ImgWidth;
  UINT32                      m_un32ImgHeight;
  UINT32                      m_un32ImgRowPitch;
  UINT8                       *m_pun8Img; // address of first pixel
  
// Direct affine transform coefficients
//-------------------------------------
  FLOAT32                     m_f32Axx;
  FLOAT32                     m_f32Axy;
  FLOAT32                     m_f32Ax;
  FLOAT32                     m_f32Ayx;
  FLOAT32                     m_f32Ayy;
  FLOAT32                     m_f32Ay;
  
// Transformed pattern description
//--------------------------------
  //   Runs list
  BOOL                        m_bIsRunReady;
                              
  EPatternRun                 *m_pRuns;
  UINT32                      m_un32MaxRuns;
  UINT32                      m_un32NumRuns;
                              
  EPatternRun                 *m_pBorderRuns;
  UINT32                      m_un32MaxBorderRuns;
  UINT32                      m_un32NumBorderRuns;
                              
  //   Pixel data             
  UINT8                       *m_pun8Data;
  UINT32                      m_un32NumData;
  UINT32                      m_un32MaxData;
                              
  //   Bounding box           
  INT32                       m_n32TrfXMin;
  INT32                       m_n32TrfXMax;
  INT32                       m_n32TrfYMin;
  INT32                       m_n32TrfYMax;
  UINT32                      m_un32StripHeight;
  
  //   Intermediate Bounding box 
  INT32                       m_n32TrfExtXMin;
  INT32                       m_n32TrfExtXMax;
  INT32                       m_n32TrfExtYMin;
  INT32                       m_n32TrfExtYMax;
  UINT32                      m_un32ExtStripHeight;
  
// Correlation computation ( constant moments)
//--------------------------------------------
  FLOAT32                     m_f32Sum;
  FLOAT32                     m_f32SumPat;
  FLOAT32                     m_f32SumPatPat;
  FLOAT32                     m_f32SigmaPatPat;
                              
  FLOAT32                     m_f32SumExt;
  FLOAT32                     m_f32SumExtPat;
  FLOAT32                     m_f32SumExtPatPat;
  FLOAT32                     m_f32SigmaExtPatPat;
  
// Searching process
//------------------
  // Don't care threshold
  UINT32                      m_un32DontCareThreshold;
                              
  MCH_CONTRAST_MODE           m_eContrastMode;
                              
  E_CORRELATION_MODE          m_eCorrelationMode;
                              
  // Search steps             
  FLOAT32                     m_f32CenterXStep;
  FLOAT32                     m_f32CenterYStep;
  FLOAT32                     m_f32AngleStep;
  FLOAT32                     m_f32ScaleXStep;
  FLOAT32                     m_f32ScaleYStep;
  FLOAT32                     m_f32ScaleStep;  INT32                       m_n32NumAngleStep;
  INT32                       m_n32NumScaleXStep;
  INT32                       m_n32NumScaleYStep;
  INT32                       m_n32NumScaleStep;  // Reduction level
  INT32                       m_n32ReductionIndex;  // Zero, first and second order moments of the ( full) pattern and image
  UINT32                      m_un32FullSum;
  UINT32                      m_un32FullSumPat;
  FLOAT64                     m_f64FullSumPatPat;
                              
  UINT32                      m_un32Sum;
  UINT32                      m_un32SumImg;
  UINT32                      m_un32SumPat;
  FLOAT64                     m_f64SumImgImg;
  FLOAT64                     m_f64SumImgPat;
  FLOAT64                     m_f64SumPatPat;protected:
  // Match Extensions (found pattern occurrences may fall outside the matching ROI)
  INT32                       m_n32ExtensionX;
  INT32                       m_n32ExtensionY;  INT32                       m_n32CurrentExtensionX;
  INT32                       m_n32CurrentExtensionY;
};// ---------------------------------------------------------------------------class EMatchStaticArray1;
class EMatchStaticArray2;
class EMatchStaticArray3;
class EMatchStaticArray4;
class EMatchStaticArray5;

Answer 8

接上
class EMatch: public EPattern  //========
{  // Wrapping members
public:
  int handle_;
  FinalizeCallback callback_;public:
  // Constructor/destructor
  E_DLL0 CONSTRUCTOR E_DLL1     EMatch                    ( );
  E_DLL0 CONSTRUCTOR E_DLL1     EMatch                    ( UINT32 un32NumDOF );
  E_DLL0 CONSTRUCTOR E_DLL1     EMatch                    ( const EMatch &Match);
  virtual E_DLL0 DESTRUCTOR E_DLL1  ~EMatch               ( );
  E_DLL0 void E_DLL1            InitEmpty                 ( UINT32 un32NumDOF );
  E_DLL0 EMatch* E_DLL1         CopyTo                    ( EMatch *pMatch = NULL) const;
  E_DLL0 EMatch& E_DLL1         operator=                 ( const EMatch &Match);
                                                         
  // Serialization                                       
  E_DLL0 void E_DLL1            Load                      ( const char* pszPathName);
  E_DLL0 void E_DLL1            Load                      ( const UNICHAR* pszPathName);
  E_DLL0 void E_DLL1            Load                      ( ESerializer* serializer );
  E_DLL0 void E_DLL1            Load                      ( FILE* file);
                                                         
  E_DLL0 void E_DLL1            Save                      ( const char* pszPathName);
  E_DLL0 void E_DLL1            Save                      ( const UNICHAR* pszPathName);
  E_DLL0 void E_DLL1            Save                      ( ESerializer* serializer );
  E_DLL0 void E_DLL1            Save                      ( FILE* file);
  
  static E_DLL0 UINT32 E_DLL1   GetVersion                ( );
  virtual E_DLL0 void E_DLL1    Serialize                 ( ESerializer* serializer, UINT32 un32Version);
  virtual E_DLL0 void E_DLL1    Serialize                 ( FILE*  pFile, BOOL bOutput, UINT32 un32Version);
                                                         
  // Learning                                            
  E_DLL0 void E_DLL1            LearnPattern              ( EROIBW8* pPattern);
  E_DLL0 void E_DLL1            LearnPattern              ( EROIC24* pPattern);
  E_DLL0 void E_DLL1            LearnImage                ( EROIBW8* pImage);
  E_DLL0 void E_DLL1            LearnImage                ( EROIC24* pImage);
  E_DLL0 void E_DLL1            ClearImage                ( );
  E_DLL0 BOOL E_DLL1            IsPatternLearnt           ( );
  //E_DLL0 EROIBW8 * E_DLL1       ComputeCorrelationImage   ( EROIBW8 *pResult);
  E_DLL0 EGenericROI* E_DLL1    CreatePatternCopy         ( ) const;
  E_DLL0 EROIBW8* E_DLL1 CreateBW8PatternCopy         ( ) const;
  E_DLL0 EROIC24* E_DLL1 CreateC24PatternCopy         ( ) const;
                                                         
  

Answer 9

link错，和.h没有关系，还是lib的问题，你把lib文件加到工程里试下吧。
你说的“在工具选项里加了”听上去不太对，应该是在项目（project）选项里吧

Answer 10

项目->"xxx"属性->配置属性->链接器->输入->附加依赖项

Answer 11

放在工程里然后 #pragma comment() 就可以了！ a......................  谢谢楼上的各位，谢谢！！！

Answer 12

你那个是编译时搜索.lib的路径顺序，比如系统的库文件，这里只指定目录名的，不说具体的库文件