increasing var twice in a statement

[chris@blueband.demon.co.uk]

I feel 10 is the correct answer due to the pre-increment operator having a
higher precedence than the addition operator. This would mean both
increments will be done before the addition (creating 5 + 5).

Chris

Original Message:
-----------------
From: Willi Mann willi@wm1.at
Date: Fri, 15 Jun 2007 16:28:32 +0200
To: gcc-help@gcc.gnu.org
Subject: increasing var twice in a statement


Hi!

Can anybody tell me what output the following program snippet should
produce according to C standard:

int main(void) {
	int a;
	int b;
	b = 3;
	a = ++b + ++b;
	printf("%d\n",a);
	return 0;
}

I would have expected 9, but gcc 4.1.2 produced a binary that wrote 10.

Willi

Please CC: me in replys, I'm not on the list.

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