Goran Krstic wrote:
... P.S. Can you recomend me some literature about programming in Mathcad?...
Some links:
http://communities.ptc.com/groups/member-showcase/blog/2010/11/11/programming-with-mathcad
http://communities.ptc.com/docs/DOC-3454
http://www.ptc.com/WCMS/files/135683/en/T2_Programming_Tutorial.pdf
http://learningexchange.ptc.com/tutorials/by_product/ptc-mathcad/product_id:4