Question

I have following code which should print array of 3072 integers:

for(int q=0; q < 3072; q++) printf("%x", band->GetData(q));

one would assume that it will print 3072 integers, however I get 3075 integers with 3 probably garbage ones at the end. Printing to the file using this code

fp=fopen("filename", "w");
fwrite(band->GetBuffer(), sizeof(int), 3072, fp);
fclose(fp);

ends almost the same, except there are 3 extra bytes at the end. Use of different arrays gives different length of garbage.
I would like to ask why that happens and whether it is really a garbage.
Thank you.

int GetData(unsigned int pos) const { ASSERT(pos < m_size); return m_data[pos]; }
int* GetBuffer()    { return m_data; }

Answer 1

The problem with the fwrite is probably because you’ve opened the file in text mode, and any 0x0a bytes written to the file will be expanded to 0x0d 0x0a.

The problem with the printf is that you’re not putting out any separators between the numbers, so you’re miscounting the output.