Determining if a number has a remainder?

This is a discussion on Determining if a number has a remainder? within the C Programming forums, part of the General Programming Boards category; How could I do this in C? Knowing the remainder would be cool too. If no one can think of ...

  1. #1
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    Determining if a number has a remainder?

    How could I do this in C? Knowing the remainder would be cool too.

    If no one can think of a way of this, how about how can I find out if a number is even or even prime?

    :-/

  2. #2
    Skunkmeister Stoned_Coder's Avatar
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    in c/c++ there is a modulus operator %

    this does an integer division and returns the remainder.

    I think you can work the rest out!
    Free the weed!! Class B to class C is not good enough!!
    And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi

  3. #3
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    Yes, % will work, but here's a fun way:
    Code:
    int divide( int toDivide, int divideBy )
    {
       int x=0;
       x = toDivide / divideBy;
       return ( toDivide == (divideBy * x) );
    }
    That should do something like:
    Code:
    printf("6 / 3 = 2, is there a remainder? %s.", divide( 6,3 ) ? "No" : "Yes" );
    Alternatly, you could just make that return the remainder:
    Code:
    int divide( int toDivide, int divideBy )
    {
       int x=0;
       x = toDivide / divideBy;
       return (toDivide-(x*divideBy));
    }
    Quzah.

  4. #4
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    Originally posted by Stoned_Coder
    in c/c++ there is a modulus operator %

    this does an integer division and returns the remainder.

    I think you can work the rest out!
    Hey thanks I had forgotten about the modulus operator!

    I need to refresh my C skills.. hehe

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