C / C++ / MFC

Leslie Sanford wrote:

I'm declaring/defining a const unsigned char array in an implementation file. I pass it to the above method

Mark Salsbery
Microsoft MVP - Visual C++

Mark Salsbery wrote:

Pass it how?

const unsigned char Sawtooth[] =
{
    // A bunch of values.
};

extern const unsigned char Sawtooth[];

class Oscillator
{
private:
    const unsigned char *wavetable;
 
// Stuff...
 
public:
    void SetWavetable(const unsigned char *wavetable);
};

#include "Wavetable.h"
 

Oscillator::Oscillator()
{
    SetWavetable(Sawtooth);
}

Leslie Sanford wrote:

error LNK2019: unresolved external symbol "unsigned char const * const Sawtooth"

Mark Salsbery
Microsoft MVP - Visual C++

Mark Salsbery wrote:

Again, this compiles and links for me

extern const unsigned char Sawtooth[];

#include "Wavetable.h"
 
const unsigned char Sawtooth[] = 
{
    // A bunch of values...
};

Leslie Sanford wrote:

I'm not sure why, but including the header file in my Sawtooth.cpp file solved the problem.

Mark Salsbery
Microsoft MVP - Visual C++

unsigned char a[100];
unsigned char b[100];
 
a = b;

const unsigned char a[100];

CString line_feed='\x00A';<br />
CStioFile file;<br />
file.Open("Temp1.dat",CFile::modeReadWrite);<br />
file.SeekToEnd();file.WriteString(line_feed);<br />
CString str="watever u want to put";<br />
file.WriteString(str);<br />
file.Close();

AfxThrowArchiveException(CArchiveException::none);