download all of the code, pictures from the internet
http://download.csdn.net/detail/vsooda/4344051
it is really a good thing.
while the codes in the book contain some mistakes..
from the codes, i found that the class was written in the header file.
that is a good behavior i think.
learn and program like that...
although i am still a rookie and i have little knowledge about that, i am still learning and making improvement~O(∩_∩)O~