C++ double returning a 0 instead of 0.1

Question

So I'm trying my hand at C++ again and I'm writing a function that keeps giving the wrong value.

I've boiled it down to a line basically this: double testD = (10/100); that gives me 0 instead of 0.1.

I might have missed something major but I thought double held decimal values? For the life of me I can't get this to be correct.

Please help me (even if I'm terribly stupid).

That might work, but as I said 'boiled down.' The 10 in that equation is actually target.getMagicDef() from a class that returns an integer value of 10. — Mowen, Aug 09 '16 at 02:38
or assign it to a `double` variable first i.e. `double d = target.getMagicDef();` — Paul Rooney, Aug 09 '16 at 02:43

Robert Columbia · Answer 1 · 2016-08-09T02:40:33.227

0

10 and 100 are integers. This will result in integer division, which will evaluate to 0. That 0 will then be stored in testD.

To force floating-point division cast one of the numbers to float or double.

((double)whatever)/something

edited Aug 09 '16 at 02:40

answered Aug 09 '16 at 02:37

Robert Columbia

Is there an elegant way to add .0 to a returned integer value? – Mowen Aug 09 '16 at 02:40
I edited my answer. Just cast it to double. – Robert Columbia Aug 09 '16 at 02:41

1 Answers1