Duck simulator

[rich heath]

https://github.com/iamagithublearner/DuckSimulator
i am trying to make a duck simulator (using factory design pattern so maybe i can learn that design pattern)
i have a duck base class , 2 sub classes , MallardDuck and RedHeadDuck
So according to the design pattern , i have to separate things that change from things that do not change.
things that change would be , the behaviors , flyingBehavior and QuackingBehavior since each duck might have diff fly and quack behaviors.
Currently the Base class has 2 instance variable: flyBehavior and quackBehavior
and there are two methods: performQuack() and performFly()
these instance variables hold a reference ro a specific behavior at runtime , for example "flyhigh" "nofly" or "loudQuack" etc..

but i think i am not implementing this correctly in the cpp code , please let me know what i am doing wrong and if i missed to provide any important info.
thank you for your time!

[vivid kite]

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[foggy fog]

Talks I liked that seem related (without looking at your code)
https://youtu.be/motLOioLJfg
https://youtu.be/OvO2NR7pXjg