Question

I need to use fwrite to write a delimiter = 0xf0f0f0f0 to a binary file. It needs to be done in such a way that 0xf0f0f0f0 appears at the beginning of the file when viewed in xxd on UNIX. I’m currently doing it this way,

  unsigned int delim[1];
  delim[1] = 0xf0f0f0f0;
  fwrite(delim, 4, 1, destination);

But it’s clearly not working since xxd is showing this at the beginning of the file:

  0000000: 90c9 49ac

Answer 1

Probably should be

 unsigned int delimnum = 0xf0f0f0f0;
 fwrite(&delimnum, sizeof(delimnum), 1, destination);

Or at least use delim[0] since array indexing starts at 0.