Recursive Character Search and Destroy

I receive a string, and I want to remove any 'a', 'b' and 'c' characters, in a recursive way.

How do I do this in C and Java?

Thanks

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What part of ``Recursive Character Search and Destroy'' you fail to understand? Or does this mean that none of you sandcore C programmers understand the concept of recursion well enough to write anything except perhaps a factorial function?