> perl
$function_used = "memcpy";
$function_call = "memcpy(a, b, sizeof(a));"
$function_call =~ s/$function_used//g;
Scalar found where operator expected at - line 3, near "$function_call"
	(Missing semicolon on previous line?)
syntax error at - line 3, near "$function_call "
Execution of - aborted due to compilation errors.

##</code><code>##

> perl
$function_used = "memcpy";
$function_call = "memcpy(a, b, sizeof(a))";
$function_call =~ s/$function_used//g;
print $function_call;
__END__
(a, b, sizeof(a))