The output is -1 how?

Question

1.00/5 (1 vote)

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void main()
{
int a=1,b=2,c;
c=~a+~b+++a+b++;
printf("%d",c);
}

What I have tried:

according to the precedence of the operator.

Posted 27-Oct-17 1:42am

Updated 27-Oct-17 2:20am

2 solutions

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CPallini · Answer 1 · 2017-10-27T02:17:00

Because you are a masochist programmer.
gcc gently hints:

warning: operation on 'b' may be undefined

before outputting -2 on my system.

Posted 27-Oct-17 2:17am

v2

OriginalGriff · Answer 2 · 2017-10-27T02:17:00

Operator precedence is not the factor. See here: Why does x = ++x + x++ give me the wrong answer?[^]

Posted 27-Oct-17 2:17am