What is state machine diagram with examples?

What is state machine diagram with examples?

A state machine diagram models the behaviour of a single object, specifying the sequence of events that an object goes through during its lifetime in response to events. As an example, the following state machine diagram shows the states that a door goes through during its lifetime.

What type of FSM is a vending machine?

The Mealy machine is also called Synchronous FSM which is a state machine that uses only input actions, and the output depends on the inputs and present state.

What are the parts of a vending machine?

These components include bill and coin validators, computer control boards, refrigeration units, and lighting.

What is the input process and output of a coffee making system?

For example, the process of making coffee by a coffee maker can take inputs such as coffee, filter, water, and electricity, and result in outputs such as coffee, used filter, used coffee and grounds.

How do you create a state machine diagram?

Creating a State Machine Diagram

1. Select Diagram > New from the tool bar.
2. In the New Diagram window, select State Machine Diagram, then click Next.
3. Name the diagram, then click OK.
4. You will now see an empty diagram with an initial pseudo state.

How do you create a state diagram?

Steps to draw a state diagram –

1. Identify the initial state and the final terminating states.
2. Identify the possible states in which the object can exist (boundary values corresponding to different attributes guide us in identifying different states).
3. Label the events which trigger these transitions.

Is vending machine Mealy or Moore?

In Mealy machine, the outputs are a function of the present state and the value of the input. In Moore machine, the output depends only on the present state.

How does a coffee vending machine work?

As the name suggests, these machines produce a beverage from the coffee bean itself. Beans are poured into a hopper at the top of the machines and released into a grinder when the user makes the appropriate payment. The ground coffee is then mixed with water, milk and/or sugar according to taste.

How does a vending machine work?

The Vending Machine becomes a context and stores a reference to the state. Vending Machine class will delegate all the actions that it receives to the specific state classes. The individual states will process the command and perform a state transition by resetting the state in the context.

What are the requirements of a vending machine?

The vending machine has to provide the solution for the following requirements.  The machine dispenses a drink, a maximum of a milk carton and a maximum of a one portion of sugar.  The combine drink-milk machine, which dispense a carton of milk.

Is it possible to add a new state to a vendingmachine?

I quickly glanced at my code & assed the effort needed to introduce a new state. It would require the introduction of a new class with an additional switch-case block. State-related logic is hard-coded in the VendingMachine class which means the Single-Responsibility principle is violated.

Why is the state-related logic hard-coded in the vendingmachine class?

State-related logic is hard-coded in the VendingMachine class which means the Single-Responsibility principle is violated. Besides, a new feature requires me to modify the same class thus going against the Open-Closed principle.