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A C++ class for simulating a ticket queue system. Each client takes a numbered ticket, waits in line, and is served based on arrival order. Useful for learning OOP, queues, and struct usage in C++.

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IssueTicket() Issues a new ticket and adds it to the queue. ServeNextClient() Serves the next client and removes them from the queue. WhoIsNext() Returns the next ticket number in the queue.