(c++) CLL -> LLL?

For the purposes of making a destructor for a particular program, our professor said that we should "turn the circular linked list into a linear linked list". What exactly does that entail? Would just setting rear to Null and a head pointer to rear->next be enough?

Lol at OP's problem. Here in Israel, we do these kinds of problems as homework assignments in high school. Is this really what American Universities are teaching?