10 Mar
2025
10 Mar
'25
12:55 a.m.
On 2025-03-09 19:39, Lawrence Stewart wrote:
The C operator precedence table has 15 precedence
levels, from “++" down
to “,"
(see https://en.cppreference.com/w/c/language/operator_precedence
<https://en.cppreference.com/w/c/language/operator_precedence>)
This is nuts. I don’t remember them and I wouldn’t trust an engineer
who claimed to.
Around 2005, when I was doing some chip verification, I found a hard to
notice operator precedence bug (in VHDL, but it is the same issue) that
would have cost us a half-million dollar mask spin.
If there is more than one operator, I use parens (I do write a[x] +
b[x], that one I know.)
Our K-12 system isn’t doing us any favors when they think PEMDAS is
“mathematics”.
-L
PS I’ve been a little angry about this since my 6th grader got marked
down for using “extra” parentheses in class.
Parentheses around expressions were required in our coding style.
S.