Number PI

[digog]

Sorry for this newby question, but is the number PI defined in Qt??
If it isnt, in which library can I find a declaration for the number PI?

[SixDegrees]

<math>, <math.h>

[digog]

<math>, <math.h>

Ok thanks.

I found it also in qmath.h.

What the difference between the math.h and qmath.h??
I mean, if I need to call a square root function whats the difference between sqrt() and qSqrt()?
And where can I find a square function?

[ChrisW67]

Asking the same thing in two places is bad form.

See http://www.qtcentre.org/threads/4090...t-qmath.h-quot

[htroyo]

maybe the difference is (i haven't use qmath.h) qmath.h was developed using OOP or Qt "primitive" types (for example if a function of math uses char* the equivalent in qmath.h uses QString wich is better than char*...), but as i told you before, i haven't used qmath.h and almost math.h

[DanH]

qmath uses Qt data types and is sensitive to certain Qt settings.