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| class FSMstate { public:
enum InputMessage {
message_on = 0,
message_off = 1,
message_ack = 2
};
virtual void Message(InputMessage mess) { cout << "undefined combo" << endl; }
};
class FSM {
public:
FSM();
void Message(FSMState::InputMessage mess) { states[current]->Message(mess); current = next[current][mess]; }
private:
FSMstate* states[3];
int current;
int next[3][3];
};
class A : public FSMstate { public:
void Message(InputMessage mess) {
switch(mess)
{
case message_on:
cout << "A, on ==> A" << endl;
break;
case message_off:
cout << "A, off ==> B" << endl;
break;
case message_ack:
cout << "A, ack ==> C" << endl;
break;
}
};
FSM::FSM() {
states[0] = new A; states[1] = new B; states[2] = new C;
current = 1;
next[0][FSMstate::message_on] = 0; next[0][FSMstate::message_off] = 1; next[0][FSMstate::message_ack] = 2;
next[1][FSMstate::message_on] = 1; next[1][FSMstate::message_off] = 0; next[1][FSMstate::message_ack] = 2;
next[2][FSMstate::message_on] = 2; next[2][FSMstate::message_off] = 2; next[2][FSMstate::message_ack] = 1; } |
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