[Sim085]

Thank you alkis, doing this gives the following result:

a: 1074790400.00 b: 4.00

This resolved the 4.01 / 4.00 issue.

So this leaves only the question on why storing the pow() result in a variable of type double prints something completely different than printing the result of pow() directly?

Originally Posted by alkis

You are using %lf in printf, try with %f

See for example this https://stackoverflow.com/a/4264154/8390560