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

>>8
But then there'd be no FORCED INDENTATION.
>>10
Then the teachers are goddamn idiots. HAVE FUN OVERFLOWING THE STACK ON MODERATELY LARGE STRINGS.