Thread: Input in binary???

  1. 03-16-2011 #1
    BHub
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    Input in binary???

    Hi all, I have a project where we're implementing a polynomial checksum. My issue is that the input file we're given is ten lines of what are supposed to be 32-bit binary numbers, i.e.

    10110001110001110101010100011001
    10010101010101010001010111011110
    10110011110001110101010100001101
    11100101111101010001000101011010
    11010101110001110101010100010101
    10011011010101010101010101111001
    10110001101101110101010100010000
    10010100110001010101010111011110
    10110001110101010101010101011011
    10110001010000010101010100111101

    What I'm stuck on is how to read these numbers from the file and treat them as binary. Any help would be appreciated.
  2. 03-16-2011 #2
    Dino
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    Pick a forum and stick with it.
    Mainframe assembler programmer by trade. C coder when I can.
  3. 03-16-2011 #3
    itsme86
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    Just use strtoul():
    Code:
    {
  FILE *fp;
  char line[BUFSIZ];
  unsigned long num;

  fp = fopen("input.txt", "r");
  while(fgets(line, sizeof(line), fp))
  {
    num = strtoul(line, NULL, 2);
    printf("%lu\n", num);
  }

  fclose(fp);
}
    If you understand what you're doing, you're not learning anything.
  4. 03-16-2011 #4
    anduril462
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    The general approach is to process the file line by line. You'll need to move left to right through each line and use a combination of the left shift operator, << and the bitwise OR operator, |, and the constant 1. You'll also need a 32-bit unsigned number initialized to zero for each line.
  5. 03-16-2011 #5
    Salem
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    Followup to Dino's comment.
    Input as binary??? - Beginner C/C++ - Forums at ProgrammersHeaven.com
    and
    Input in binary??? - Dev Shed

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  6. 03-16-2011 #6
    BHub
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    Okay, I get it. Won't cross-post any more, I just wasn't sure if I would get an answer. Don't have to harp on it. My bad.
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