Right associative??

This is a discussion on Right associative?? within the C Programming forums, part of the General Programming Boards category; Please read the following link: http://en.wikipedia.org/wiki/Shunting_yard_algorithm ... o1 is associative or left-associative and its precedence is less than (lower precedence) ...

  1. #1
    Ugly C Lover audinue's Avatar
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    Right associative??

    Please read the following link:

    http://en.wikipedia.org/wiki/Shunting_yard_algorithm

    ... o1 is associative or left-associative and its precedence is less than (lower precedence) or equal to that of o2, or
    o1 is right-associative and its precedence is less than (lower precedence) that of o2 ...
    What is the meaning of 'right-associative' and 'right-to-left evaluation', please?

    I've wrote the algorithm and the last output is:
    3 4 2 * 1 5 - 2 ^ 3 ^ / +

    Something terribly wrong... T_T
    Last edited by audinue; 07-05-2008 at 02:52 PM.

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    DESTINY BEN10's Avatar
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    If two operators have the same precedence,then which operator to be evaluated first is determined by the associativity rule.
    right associativity- the opearators are evaluted from right to left
    eg a=b=3;
    here both '=' have the same priority thus b=3 is assigned first due to right associativity
    left associativity- the opearators are evaluted from left to right
    eg a=3/2*5;
    both '/' and '*' have the same precedence and due to left ass. 3/2 is evaluated first.
    Hope u understand

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