if anyone can tell me what's wrong with this code

This is a discussion on if anyone can tell me what's wrong with this code within the C Programming forums, part of the General Programming Boards category; it suppose to put all the ascii codes for 1 to 255 in the files and then read it back ...

  1. #1
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    if anyone can tell me what's wrong with this code

    it suppose to put all the ascii codes for 1 to 255 in the files and then read it back
    it got stuck at i=26 in the reading process
    10x
    Code:
    #include <stdio.h>
    
    void main()
    {
      FILE *fp;
      int i;
      int c;
      fp=fopen("d:\\1.txt","w");
      for(i=1;i<=255;i++)
      {
        fputc(i,fp);
      }
      fclose(fp);
      fp=fopen("d:\\1.txt","r");
      for(i=1;i<=255;i++)
      {
    
          c=fgetc(fp);
          printf("&#37;d\n",c);
      }
      fclose(fp);
    }

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    14,185
    Ctrl-Z (ASCII number 26) can be interpreted as end of file in Windows. You can try opening the file in binary format to prevent that sort of thing. (I would also expect you to get an extra 10, since I think ASCII 13 would get written to a text file as 10 & 13. Or maybe fputc doesn't do that.)

  3. #3
    and the hat of wrongness Salem's Avatar
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    Also, void main is wrong.

    > Or maybe fputc doesn't do that.
    It will, but then fgetc will undo it and the expected result will be seen.
    But the file will be 256 bytes long, not 255.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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