<div>
struct page<br />
{<br />
&nbsp; &nbsp; &nbsp;int pointer;<br />
&nbsp; &nbsp; &nbsp;int no_entries;<br />
&nbsp; &nbsp; &nbsp;record rec[7]; &nbsp; &nbsp; <br />
};//end struct page<br />
<br />
struct record<br />
{<br />
&nbsp; &nbsp; &nbsp; &nbsp; int key;<br />
&nbsp; &nbsp; &nbsp; &nbsp; int order;<br />
}<br />
<br />
page p;<br />
<br />
for(int i=0;i&lt;=6;i++)<br />
{<br />
&nbsp; p.rec[i].key = some_int_val;<br />
&nbsp; p.rec[i].order = some_int_val;<br />
}<br />
<br />
fseek(fp,valid_position,0)<wbr />;<br />
fwrite(&amp;p,sizeof(page),1,f<wbr />p);<br />
<br />
<br />
Now an fread(&amp;p,sizeof(page),1,fp<wbr />) returns me some junk <br />
value for key..<br />
<br />
<br />
&nbsp; 
</div>


struct page
{
     int pointer;
     int no_entries;
     record rec[7];    
};//end struct page

struct record
{
        int key;
        int order;
}

page p;

for(int i=0;i<=6;i++)
{
  p.rec[i].key = some_int_val;
  p.rec[i].order = some_int_val;
}

fseek(fp,valid_position,0);
fwrite(&p,sizeof(page),1,fp);


Now an fread(&p,sizeof(page),1,fp) returns me some junk
value for key..


 

<div>
code is incomplete so it is hard to say, but...<br />
Are you checking file functions' return values ?<br />
Do you close the file, and the open it again, if not, do you set back file pointer to correct place before reading?<br />
I think it is some I/O error. <br />
<br />
Regards<br />
Pawel.
</div>


code is incomplete so it is hard to say, but...
Are you checking file functions' return values ?
Do you close the file, and the open it again, if not, do you set back file pointer to correct place before reading?
I think it is some I/O error.

Regards
Pawel.

<div>
You are welcome. Don't ask me if I have done this kind of errors myself before cause I have not! :)
</div>


You are welcome. Don't ask me if I have done this kind of errors myself before cause I have not! :)

<div>
<div class="content wysiwyg-content">
Hi All,<br />
<br />
&nbsp; &nbsp;My problem is If I write an Integer into a file, integer shifts beyond a limit. I get junk values like <br />
-828373764 for some value like 25 or 30 written into the file. Any suggestions. Thanks.I've declared the numbers as unsigned long.
</div>
</div>


Hi All,

   My problem is If I write an Integer into a file, integer shifts beyond a limit. I get junk values like 
-828373764 for some value like 25 or 30 written into the file. Any suggestions. Thanks.I've declared the numbers as unsigned long.

Integer shift problem

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.