Can anyone explain about "class"?

Answer 1

https://www.sololearn.com/learn/CPlusPlus/1710/?ref=app

Answer 2

An object is an instance of a class. Think of it as a class being the idea of how to build an object and the object is the ready built thing. Like the Plans to build a house (thats the house-class) and a real house (thats an object of this very class)