Numerical examples in two dimensions

The work for the two dimensional code was to implement the presented method in the code my advisor used. The code was written in C++. I had to learn a lot of things on C++, the basis of the object oriented programming (structures, classes, pointers, etc ...) from [BuddBudd1998] and [Deitel and DeitelDeitel and Deitel1998] and a lot concerning the way of programming of this code: The way of working of the code, how to use the big number of different existing routines and how to code new routines. In the 2-D code, I had implemented the enrichment ``shape'' for accuracy reasons. Indeed, with a continuous enrichment function, we can evaluate the temperature at more points than with a discontinuous enrichment function.