How to count the number of lines of code in Linux

How to count the number of lines of code in Linux-general Linux technology-Linux programming and kernel information. For more information, see the following. When programming, we often want to count how many lines of code we have written. What should we do at this time?
Although Vim and other editors have lines of code displayed, they cannot be opened one by one and then added up?
The wc tool is required at this time. It is very powerful, though its name is not very good.
Usage:

In the current directory:
Wc-l *. c *. h

Current Directory and subdirectory:
Find.-name *. c | xargs wc-l
Find.-name *. cpp | xargs wc-l
Find.-name *. h | xargs wc-l

Is it convenient?

PS: no more than 600 lines of my Cugb Linker ...... Effort!

From day-dust: http://hi.baidu.com/ivenvd/blog/... 52690d18d81fef.html