C++ state machine design pattern

State Pattern Approach: State pattern is one of the behavioural design patterns devised by Gang Of Four . In this pattern, the concerned object holds internal state which can change & the object’s behaviour changes accordingly.

State design pattern is used when an Object changes its behavior based on its internal state . If we have to change behavior of an object based on its state, we can have a state variable in the Object and use if-else condition block to perform different actions based on the state.1 Eyl 2021

The state pattern is used in computer programming to encapsulate varying behavior for the same object, based on its internal state . This can be a cleaner way for an object to change its behavior at runtime without resorting to conditional statements and thus improve maintainability.

State is a behavioral design pattern that lets an object alter its behavior when its internal state changes.