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

>>42
oops...
void remove_char(char*s,char c){
 for(char*r=s;*s;*r=!s++)if(*s!=c)(*r++=*s);
}