Odd / Even numbers

This is a discussion on Odd / Even numbers within the C++ Programming forums, part of the General Programming Boards category; I saw this on the forum about 3 weeks ago but can't seem to find it. All I want to ...

  1. #1
    Supermassive black hole cboard_member's Avatar
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    Odd / Even numbers

    I saw this on the forum about 3 weeks ago but can't seem to find it.

    All I want to do is differentiate between an odd and even integer entered by the user:

    Code:
    int main () 
    {
    	int number;
     
    	cout << "Number: ";
    	cin >> number;
     
    	// test etc
     
    	return 0;
    }
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  2. #2
    Registered User Codeplug's Avatar
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    You can use a modulus of 2 to check for a remainder, or do a bit-wise AND with 1.

    gg

  3. #3
    Supermassive black hole cboard_member's Avatar
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    Thank you! Maths was never my strong point....
    Good class architecture is not like a Swiss Army Knife; it should be more like a well balanced throwing knife.

    - Mike McShaffry

  4. #4
    Registered User mrafcho001's Avatar
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    Maybe you shouldn't be programming then.. programming involves a lot of math

    in my school my Math teacher had a chart thing it had over 100 professions on it and lot of math things on the side, and if the profession required the math thing it had a dot..

    only two that had the whole columns full were Programmer and physicist
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  5. #5
    Supermassive black hole cboard_member's Avatar
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    Oh don't worry man I've been programming for 4 years and 5 months (not sure about the days ) and any maths problems I have I find enjoyable to solve by picking up a good maths book.

    For some reason I find it hard to learn maths, not sure why. Programming and computing are my passions
    Good class architecture is not like a Swiss Army Knife; it should be more like a well balanced throwing knife.

    - Mike McShaffry

  6. #6
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    Math Lesson of the day

    what the cubed root of 512, no cheats!!!!

    and only ahluka can answer.

  7. #7
    Supermassive black hole cboard_member's Avatar
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    Good class architecture is not like a Swiss Army Knife; it should be more like a well balanced throwing knife.

    - Mike McShaffry

  8. #8
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    close its 8


    8 * 8 * 8 = 512

  9. #9
    Supermassive black hole cboard_member's Avatar
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    Oh no, my 3rd U grade in Maths this year.

    *points gun to head*
    Good class architecture is not like a Swiss Army Knife; it should be more like a well balanced throwing knife.

    - Mike McShaffry

  10. #10
    Frequently Quite Prolix dwks's Avatar
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    Code:
    if(number % 2) {  /* number is odd */
    
    }
    else {  /* number is even */
    
    }
    dwk

    Seek and ye shall find. quaere et invenies.

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  11. #11
    aoeuhtns
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    Cool programmers simply write:

    Code:
    bool is_odd(unsigned int x);
    bool is_even(unsigned int x);
    
    bool is_odd(unsigned int x)
    {
        if (x) return is_even(x - 1);
        return false;
    }
    
    bool is_even(unsigned int x)
    {
        if (x) return is_odd(x - 1);
        return true;
    }
    ;-)

  12. #12
    Skunkmeister Stoned_Coder's Avatar
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    Yeah really cool. Superfast especially for big numbers. I hope cool was a synonym for dumb.
    Free the weed!! Class B to class C is not good enough!!
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  13. #13
    Code Goddess Prelude's Avatar
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    >programming involves a lot of math
    It depends on the field. In my experience, the only math that is required is basic arithmetic. Higher math helps, but not for everyday programming.
    My best code is written with the delete key.

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