Hi Karl,

You wrote to me:

KC>->KC>When i do multiple fread in a file, the position of
KC>->KC>the file isn't updated.

KC>->It is in all the compilers I've used.

KC>->KC>Why? What should i do to correct this? Thanks in advance.

KC>->If you show us the code that is giving the problem including the file
KC>->open, preferably in a compileable excerpt, then we can tell you.



KC>The file I want to open is a BitMaP file and I open it in "rb" (read
KC>binary) mode. I call a fread for the file header structure and for the
KC>info header structure. after this, I call multiple fread for the
KC>palette. There was the bug. This is the source code of where the bug is:

KC>for(i=0;i<256;i++)
KC>        fread(palette[i],sizeof(RGBQUAD),1,in);
KC>// palette is an array of RGBQUAD
KC>////

The only likely bug I can see there is palette[i], rather than
&palette[i], you pass the _location_ to read the data into (the address
of the variable), not the variable itself.

It would be much simpler (and quicker) to do:

fread (palette,sizeof(palette[0]),256,in);

As you didn't give the surrounding code and a compileable excert I can't
do any more, I really need to see more than you have given to give
proper help. What I am certain of though is that you are
mis-interpreting the side effects of a bug in your code as being a
problem with fread().

George

 * SLMR 2.1a * Computers eliminate spare time.

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