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Puzzle

Hello All,

Why output of this program is 10 and 6. Please the reason.

main()
{
int x=1;
x=++x + ++x + ++x;
printf("%d\n",x);
x=1;
x=x++ + x++ + x++;
printf("%d\n",x);
}

Output:-
10
6

Thanx in advance
Apr 14 '07 #1
1 941
JosAH
11,448 Expert 8TB
The reason: undefined behaviour.

Changing the value of a modifiable l-value more than once before a sequence
point has been reached causes undefined behaviour; anything could've happened.

kind regards,

Jos
Apr 14 '07 #2

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