How to prepare a cash flow statement explain with example

That is an entire chapter's worth of stuff. How about a couple of links instead:
http://www.principlesofaccounting.com/chapter%2016.htm (http://www.principlesofaccounting.com/chapter%2016.htm)
http://www.accountingcoach.com/online-accounting-course/06Xpg01.html

Whatever questions you have, you're going to have to get specific cause it's a big topic.