vb binary file into c++ array

[willakawill]

I have a very large binary file saved from a vb array with 2 dimensions;

Dim arMatrix() As Byte
Dim fNum As Integer
ReDim arMatrix(7166, 17769)
 
'code here to store data from a database into this
'array
 
'get a free file number
fNum = FreeFile()
 
'open the binary file
Open strMatrix For Binary As #fNum
 
'store the matrix array
Put #fNum, , arMatrix
Close #fNum

When I read the binary data back into the array it works. (i check the data against a database which was the origin of the binary file)

Dim arMatrix() As Byte
Dim fNum As Integer
ReDim arMatrix(7166, 17769)
 
fNum = FreeFile
    Open "C:\Data\matrix" & Format(lngMatrix, "00") & ".bin" For Binary As #fNum
    Get #fNum, , arMatrix
    Close #fNum

If, instead of a bi-dimensional array, I read this file into a single dimension array with 7167 * 17770 elements the code works but the data is not in the right order.

Dim arMatrix() As Byte
Dim fNum As Integer
ReDim arMatrix((7167 * 17770) - 1)
 
fNum = FreeFile
    Open "C:\Data\matrix" & Format(lngMatrix, "00") & ".bin" For Binary As #fNum
    Get #fNum, , arMatrix
    Close #fNum

This wrong order also appears when I try to read the same binary data into a c++ array as in:

void CMFCNetflixDlg::OntxtTestMatrix() 
{
    ifstream f ("C:\\Data\\matrix01.bin", ios::in | ios::binary);
    streambuf * fb;
    int counter;
    fb = f.rdbuf();
 
    char **arMatrix;
    arMatrix = new char *[7167] ;
    for( int i = 0 ; i < 7167 ; i++ )
        arMatrix[i] = new char[17770];
 
    char buff[2];
    char title[10];
 
    for (counter = 0; counter < 7167; counter++) {
 
         fb->sgetn(reinterpret_cast<char *>(arMatrix[counter]), 17770);
 
    }
 
    f.close();
 
                //testing the order of bytes
    for (i = 0; i < 17770; i++) {
        if ((arMatrix)[0][i]) {
            itoa((int)(arMatrix)[0][i], buff, 10);
            itoa(i, title, 10);
            MessageBox(buff, title);    
        }
    }
    delete [] arMatrix;
 
}

Any ideas on how to open this file so that the bytes are in the right order?

Thanks

[Banfa]

Clearly vB is writing the data of a 2 dimensional arry to the file in a strange order.

I would say that you options are

1. Work out what that strange order is an write some code to read the file contents into the single dimensioned buffer correctly.

2. Alter the code that writes the data so that instead of writing the entire array it writes individual entries in the arry in an order specified by yourself (and therefore readable by yourself).