The person who answer your question before me may not have a clear view of your request.
If you want to get some fish-coins, you can take their answer.If not,you want know how to get
C coins,you can refer to this introduction of this web page.
http://bbs.fishc.com/thread-83715-1-1.html
The main method to get C coins is to join Mutual aid team and answer other people's questions.
If your answer is adopted by the questioner,and one month your answer was adopted in the top three
you will get the C coins reward.