How can I implement a finite state machine in C++?

How can I implement a finite state machine in C++?

To implement a finite state machine in C++, you can define states as classes or enums and use a switch statement to handle transitions.

Can you provide a simple code example?

Sure! Here's a basic example:

enum class State { START, PROCESS, END };

class FiniteStateMachine {
public:
    State currentState;

    FiniteStateMachine() : currentState(State::START) {}

    void transition() {
        switch (currentState) {
            case State::START:
                currentState = State::PROCESS;
                break;
            case State::PROCESS:
                currentState = State::END;
                break;
            case State::END:
                // No transition
                break;
        }
    }
};

This code defines a simple FSM with three states.

What if I want to add more states?

You can simply add more states to the enum and expand the switch statement in the transition method to handle the new states accordingly.

Are there any libraries that can help with FSM in C++?

Yes, there are several libraries like Boost.Statechart and SMC (State Machine Compiler) that can help you implement FSMs more easily.