On 8/3/20 5:53 AM, Martin Tschierschke wrote:
On Friday, 31 July 2020 at 14:18:15 UTC, Steven Schveighoffer wrote:
On 7/31/20 9:55 AM, Martin Tschierschke wrote:
What would be the idiomatic way to write a floating point division
occuring inside a loop and handle the case of division by zero.
c = a/b; // b might be zero sometimes, than set c to an other value (d).
(In the moment I check the divisor being zero or not, with an
if-than-else structure,
but I find it ugly and so I ask here.)
c = b == 0 ? d : a/b;
I don't think a function would be shorter or clearer...
c = div(a, b, d);
Alternatively, you could use a type to effect the behavior you want.
Thanks, for the hints.
I find the ? : - expressions sometimes hard to reed, especially when a
and b are not so simple expressions.
I prefer putting additional bracket around:
c = (b_expression == 0) ? (d_longer_expression) :
(a_expression/b_expression);
Yes, that is fine, and up to your preference. You may actually need the
parentheses if the expressions somehow override the precedence of the ?:
operator.
Even with symbol uses, I personally would do actually:
c = (b == 0 ? d : a/b);
Just because the ` = b == ` looks really bad to me.
-Steve
