N° of the week from a date

[Dieter]

(11-03-2015 07:09 PM)ggauny@live.fr Wrote:  I was not knowing this thread. Is my routine agree you ?
Do you like my routine ? If yes i'm proud.

Your program takes advantage of some techniques you did not use before, for instance INC and integer constants. So that's indeed a step forward. Another step could include using RCL-arithmetice (e.g. RCL+I instead of RCL I +) and integer division (7 IDIV instead of 7 / IP).

But I'm not sure if the formula is correct. I tried the sample cases in the mentioned New Year's challenge thread, and some results are wrong. For instance, the program may return week 0 (try 2 Jan 2010). Or Monday, 31 Dec 2012 returns week 53. What about the elegant formula on that French website?

(11-03-2015 07:09 PM)ggauny@live.fr Wrote:  I have posted a new little routine that return the date from a DOY. She is in the test forum. Now I know it is the right place.

The test forum ist for testing forum features. ;-)

Dieter