Expert: Prince M. Premnath - 9/26/2007

Question
Hi,

How are you? I'd like to kindly ask for your help with the following problem
(I'm only showing the relevant parts of my program)
First I need to divide a binary file into two files. I do it like this:

static int *p;

while (feof(oldfile)==0)
  {
    if (length<1000)
      {    
      fread(&p, 1, 1, oldfile);
      fwrite(&p, 1, 1, newfile1);
      }
    if (length >=1000)
      {
      fread(&p, 1, 1, oldfile);
      fwrite(&p, 1, 1, newfile2);
      }
    length +=1;
  }

Then I need to put the two new files back together (merged file):

 while(feof(newfile1)==0)
     {
     fread(&p, 1, 1, newfile1);
     fwrite(&p, 1, 1, mergefile);
     }
     
  while(feof(newfile2)==0)
     {
     fread(&p, 1, 1, newfile2);
     fwrite(&p, 1, 1, mergefile);
     }

I treat all files like binary files when I open them. The problem I have is that in my new file (mergefile) I get
doubling of bytes exactly where the two files (newfile1 and newfile2) were joined together. Also I get additional spaces at the end
of the new file (mergefile). Do you know why? Is the feof() a problem or do I have a prblem with my pointers? Why don't I get
perfect fusion of the two files.
Sincerely,
                Tom

Answer
Hi dear Tom !

Yep , im fine hope u too . really merging of files won't increase the file size !If so then there might be some errors with your algorithm .

instead of fwrite() putc() will do the job efficiently also binary files treat each and ever character as 'char ' type so thats good to use char data type to read and write the data's over the binary file ( sure thats why your file size is doubled and extra spaces )

let me revise this code !
char ch;

while (feof(oldfile)==0)
 {
   ch = getc(oldfile);
   if( length <= 1000)
        putc(ch , newfile1);
   .
.
.
.
.
.
.
}

Im sure this code will really help you out !
If i got some leisure time sure ill send some code excerpts related to ur problem

Thanks and Regards !
Prince M. Premnath