modified:   README.md
	modified:   README.md
	modified:   README.md
	modified:   README.md
	modified:   README.md
	modified:   .gitignore
	modified:   ../.gitignore
	new file:   ch02.pro
commented and removed a unused parameter.
	modified:   ex2_4_1a.cpp
	new file:   ex2_4_1c.cpp
still working, not finished
	modified:   ch02/ex2_4_1c.cpp
update : use lambda + do while instead.
	modified:   ex2_4_1a.cpp
better naming
	modified:   ex2_4_1a.cpp
fix bug : not working for input like  aaa or aaaaa
	modified:   ch02/ex2_4_1a.cpp
Merge pull request #1 from Mooophy/master

update from mooophy