yOn Thu, 18 Nov 2004, Isidro Cachadiña Gutiérrez wrote: [...]
cln::cl_R expt(cln::cl_R x, cln::cl_R y) { return exp(x*ln(y)); }
And It works fine, but I think that It have to be defined somewhere in the library.
Well, only if `x' is positive, right? This is ok because the result is a complex number. Or if `y' is integer. No, y can be a real number. There isn't any problem with this.
Oops, I hadn't even noticed that you got `x' and `y' interchanged. My statement about `y' being integer only makes sense when you put `x' and `y' in the conventional order.
Normally if you are using real numbers you don't expect to find things like this -5.34^7.32.
Since "real number" is well defined, either your definition of "normally" or your definition of "to expect" does not agree with my definition. :-) Or, maybe, both. :-) Saludos quadrados -richy. -- Richard B. Kreckel <http://www.ginac.de/~kreckel/>