problem with fwrite

Cadimi

I do it on Visual Studio 2005 SP1. I added config.pcm into my solution. After I had run my program, if config.pcm changed the content, then Visual Studio would ask you to update the content of that file. When I debug, I see the file pointer increase, but after I closed fout, VS didn't ask me to update the content -> the content hadn't been modified. m_hkArr is vector m_hkArr. The structure of struct HOTKEY: struct HOTKEY { BOOL isCtrl; UINT c; TCHAR szPath[256]; int id; //id of this hot key }; This struct is self-identified Hotkey :D. I just check for Ctrl or Alt is press with the key. id is the ID of the hotkey, return value of GlobalAddAtom. The code I have posted just a bit of my code

CPallini

Are you sure you're writing to the same file that is open by Visual Studio?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

Cadimi

yes, When I change the config of my program, so, it have to write in the config.pcm. All the configurations of my program are written on config.pcm except for the hotkeys ( the bolded code )

CPallini

How can you see the file pointer advancing? How many HOTKEY items did you successfully write (i.e. Did you check temp value? Did you check fwrite return value?)? :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

Cadimi

when debuging, just watch for the file pointer, so, I can see fout increase the value, I write 1 or 2 HOTKEY to try, but the content no change. When I read the file, the value is 0 >.<

CPallini

Cadimi wrote:

I write 1 or 2 HOTKEY to try

But then do you close the file?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

Cadimi

as you can see in the code, I closed it, and before closed it, I fflush( fout ) carefully :D

CPallini

Yes, I saw the code, anyway I was referring to you debugging actions (i.e. I didn't know if you stopped the program after few write operations). The reason behind my questions is I cannot believe fwrite silently failing, it never happened to me. Can't you isolate the failing piece of the writing routine and run it in a simpler context (for instance another, adhoc, project)?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke

Cadimi

thanks for your help, that's the worse thing I've ever met >.<

David Crow

Cadimi wrote:

FILE *fout = fopen( "config.pcm", "wb" );

Are you using a relative path? What is the value of temp?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Cadimi

temp is the number of hotkeys, its value is the size of the vector contain my HOTKEY struct

David Crow

Cadimi wrote:

temp is the number of hotkeys, its value is the size of the vector contain my HOTKEY struct

I know what it represents. I asked what its value was (at the time of writing to the file).

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Cadimi

I tried a simple example, its value at that time is 1

David Crow

Ok, what do the two subsequent calls to fwrite() return?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Cadimi

I just watch the file pointer, it increase the value equal to the size I've requested to write on file

David Crow

But what do the two subsequent calls to fwrite() return?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Cadimi

I've found my problem :D... It happened when I ust CFileDialog in another code, select a path, then the default directory change too => write file at another place => can't read. Thanks for your help

David Crow

Cadimi wrote:

...can't read.

Which is why I was asking if fopen() was failing.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne