simple modulus question

This is a discussion on simple modulus question within the C Programming forums, part of the General Programming Boards category; Why is this printing 0 instead of 5? Doesn't the modulus operator result in the remainder after a division? Code: ...

  1. #1
    Linux is where it's at movl0x1's Avatar
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    simple modulus question

    Why is this printing 0 instead of 5? Doesn't the modulus operator
    result in the remainder after a division?

    Code:
    int main(void)
    {
        int c = 0;
        int remainder = c % 5;
    
        printf("%d\n", remainder);
        return 0;
    }
    thanks
    Remember that all that code you write turns into this:

    0100100100110010010011100100111001001
    0010100100100001001111100010010010010 ....

  2. #2
    C++ Witch laserlight's Avatar
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    Suppose that the remainder of dividing 0 by 5 is 5.

    If this is true, then here's a simple get rich quick scheme: let n be the number of people in the world. Divide $0 by n. You get to keep the remainder, $n. You now have about 6 billion dollars in your hand. Repeat until you are satisfied.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  3. #3
    Linux is where it's at movl0x1's Avatar
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    thanks laserlight.


    I think I got it (maybe).
    Remember that all that code you write turns into this:

    0100100100110010010011100100111001001
    0010100100100001001111100010010010010 ....

  4. #4
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    the first operand is divided by the second operand to produce the remainder (eg, in this case, 0 is divided by 5, which results in "0 R 0")

    if you switch the two operands around (ie, 5 % 0) you will get a divide-by-zero error, but theoretically I guess 5 should be returned

  5. #5
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    > if you switch the two operands around (ie, 5 % 0) you will get a divide-by-zero error, but theoretically I guess
    > 5 should be returned

    If you / or % by 0, the result is undefined (anything can happen).

  6. #6
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    If you / or % by 0, the result is undefined (anything can happen).
    Yes, I stand corrected =)
    sorry, I was thinking in java.

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