In the C++ language, what does sloc and rloc mean?

Question

In a Class Queue example, I noticed that sloc and rloc were used but I don’t know what they mean. Does anyone know?

Example:
class queue {
int q(100);
int sloc, rloc;
public:
void init();
void qput(int i);
int qget();
};

Answer 1

A brief search online shows that sloc and rloc are most probably integers representing the current/first index of objects within the queue. The queue initializes the two variables to zero, and when an object enters the queue, it is inserted at q[sloc], and then sloc is incremented by 1. When you get an object from the queue, q[rloc] is returned, and rloc is incremented by 1.