D float types operations vs C++ ones

Ali Çehreli via Digitalmars-d-learn digitalmars-d-learn at puremagic.com
Thu Dec 17 08:34:27 PST 2015

On 12/17/2015 03:50 AM, drug wrote:

 > D and C++ [...] But with some data the results differ

You may have similar results between two C and two C++ compilers, even 
between two different versions of the same compiler.

In addition to possible reasons that has already been mentioned, note 
that function arguments can be evaluated in any order by compilers of C 
and C++ (D uses left-to-right). For example, for the following 
expression, gcc evaluates bar() first but dmd (and other D compilers) 
evaluate foo() first:

     h(foo(), bar())

If foo() and bar() have side effects on floating values, those values 
can be observed differently.


More information about the Digitalmars-d-learn mailing list