Review for Test

[arrgh]

I'm studying for an exam, so hopefully someone can clarify some things for me. Thought I'd post everything under one thread, instead of making a new one for every question that comes up. I typed up a list of precedence levels and this is what I've got so far.

unary - +
arithmetic operators * / % - +
relational operators < > <= >=
logic operators && ||
bitwise operators ~ & ^ |

I'm not sure where >> and << go.

I found this list on some site, but it doesn't include bitwise operators.

( ) [ ] -> .
! ~ - * & sizeof cast ++ -
* / %
+ -
< <= >= >
== !=
&
^
&&
||
?: (right->left)
= += -= (right->left)
, (comma)

Thanks in advance!
You guys have been so helpful!! All the little things I've overlooked or ignored are starting to make sense

[laserlight]

I'm not sure where >> and << go.

They are bitwise operators.

[arrgh]

But which has greater precedence? For example:

i >> ~j ^ k

Would this be (i >> (~j)) ^ k or i >> ((~j) ^ k)?

[laserlight]

It would be equivalent to: (i >> (~j)) ^ k

[Elysia]

Rather than trying to remember the precedence of everything, I would recommend using parenthesises to explicitly specify what goes first and in what order, because even if you do remember for the test, you will most likely forget at later dates.

[manav]

Why they had to follow the precedence ?
Would not it be more apt just to do it from left to right?

5 + 4 * 2 = 18

Edit: I mean, why language designers use precedence!

[matsp]

Why they had to follow the precedence ?
Would not it be more apt just to do it from left to right?

5 + 4 * 2 = 18

Edit: I mean, why language designers use precedence!

Becuase the mathematicians set up rules about the order of precedence, and computer people (in the beginning) were often of a mathematical/engineering background, so they followed the same principle. But you are right, there is no absolute need for it. Simple calculators tend to NOT have operator precedence, you have to explicitly use parenthesis (or the "M" buttons) and such.

--
Mats

[arrgh]

If you declare a variable extern inside a function, then the variable has static storage duration, but still has a block scope, so is there a way to change the scope of a variable within a function?

[robwhit]

Duplicate

http://cboard.cprogramming.com/showthread.php?t=102781