Multiple declaration

[yuelabtina]

Hi,

I wrote a class WAVELET1 in borland c++ 6.0 environment.
And used this class member function in another file.
It always said there was error when compiled.
The error messages were as followings,

[C++ Error] wavelet.h(6): E2238 Multiple declaration for 'WAVELET1'
[C++ Error] wavelet.h(6): E2344 Earlier declaration of 'WAVELET1'

And i searched 'WAVELET1' in whole project file, the results were as followings,

C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\FIRFilter.cpp(112): fir= new WAVELET1;
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\FIRFilter.h(39): WAVELET1 *fir;
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.cpp(12): WAVELET1::WAVELET1(void)
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.cpp(12): WAVELET1::WAVELET1(void)
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.cpp(16): WAVELET1::~WAVELET1(void)
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.cpp(16): WAVELET1::~WAVELET1(void)
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.cpp(20): void WAVELET1::testTF(int fNumSample, double fSamplingRate, double *fTestdata )
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.cpp(176): double WAVELET1::correlation (int fLowCheckFreq, int fHighCheckFreq, int fLowCheckSample, int fHighCheckSample, double fNormRightTemplate, double fNormLeftTemplate, double *flefttemplate, double *frighttemplate)
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.h(6): class WAVELET1 {
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.h(11): WAVELET1( void );
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.h(12): ~WAVELET1( void );
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.h(6): class WAVELET1 {
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.h(11): WAVELET1( void );
C:\yangqdata\BCI2000\src\SignalProcessing1\FIR\wavelet.h(12): ~WAVELET1( void );

The last three were the same as the three before last three.
It was strange.
The wavelet.h file is as following,

#define LOWFREQ    1
#define HIGHFREQ   30
#define CHANNEL    2
#define MAXSAMPLE  200
 
 
class   WAVELET1  {
private:
        double fTF [CHANNEL][HIGHFREQ-LOWFREQ+1][MAXSAMPLE];
public:
        WAVELET1( void );
        ~WAVELET1( void );
        void testTF( int,double, double *);
        double correlation( int, int, int,int, double, double, double *, double *);
} ;

I don't know what's wrong?

Tina

[Narue]

I'm betting your header file doesn't have inclusion guards on it:

#ifndef MY_HEADER
#define MY_HEADER

#define LOWFREQ    1
#define HIGHFREQ   30
#define CHANNEL    2
#define MAXSAMPLE  200
 
 
class   WAVELET1  {
private:
        double fTF [CHANNEL][HIGHFREQ-LOWFREQ+1][MAXSAMPLE];
public:
        WAVELET1( void );
        ~WAVELET1( void );
        void testTF( int,double, double *);
        double correlation( int, int, int,int, double, double, double *, double *);
} ;

#endif

Failure to do that will cause problems with most headers if you include them multiple times in your project.

[yuelabtina]

Thank you very much!
It worked.

I'm betting your header file doesn't have inclusion guards on it:

#ifndef MY_HEADER
#define MY_HEADER
 
#define LOWFREQ    1
#define HIGHFREQ   30
#define CHANNEL    2
#define MAXSAMPLE  200
 
 
class   WAVELET1  {
private:
        double fTF [CHANNEL][HIGHFREQ-LOWFREQ+1][MAXSAMPLE];
public:
        WAVELET1( void );
        ~WAVELET1( void );
        void testTF( int,double, double *);
        double correlation( int, int, int,int, double, double, double *, double *);
} ;
 
#endif

Failure to do that will cause problems with most headers if you include them multiple times in your project.