In my mind,the recursion of functions and artificial intelligence is the most interesting.By recursion,I solved hanoi Tower problem in just a few lines of codes,and the heuristic of A* algorithm in arificial intelligence to solve eight-puzzle is also full of wisdom,they make me excited.Besides,i know how the cpu fetch the code and execute it in a circle,which uses machine language.different machine have different machine language,but they all consists of 0 and 1.different sequence and combinati