Thread: Lost ("short int" and "while" statements)

Originally Posted by dwks

Ever seen code like this?

Code:

for(x = 0, y = 1; ...

That's using the comma operator.

I have of course... in for loops.

Same idea anywhere else: the left side is evaluated, then the right side, and the whole expression gets the value of the right side. So this

Code:

do
    code();
while(expression());

is the same as

Code:

do
    ;
while(code(), expression());

(Your compiler might want you to put extra parentheses around there, you never know. Oh, and the semicolon is necessary. )

Now that is syntax unknown to me and syntax I've never actually seen used somewhere. Though I don't think I would ponder using it. Too obscure.
Btw, by obscure, I mean using it in a while loop as shown there. I could use it to initialize several variables in a for loop, or to increment two counters or such in a for loop, which I've done before, but not do...while loops, like that.
But anyway, this still means that theonetruehero mixed them up in the wrong order.

Yes, I wasn't saying theonetruehero's code was correct -- it isn't.

Nor would I recommend using the comma operator in while loops. I was just pointing out that it is possible.

I have seen the comma operator used outside of for loops, however. (Not in while loops, though.) For example:

Code:

if(in_position()) x ++, y ++;

Whether you find legible and use that sort of code or not is up to you . . . .