C++ for Lazy Programmers: Quick, Easy, and Fun C++ for Beginners

© Will Briggs 2019

W. BriggsC++ for Lazy Programmershttps://doi.org/10.1007/978-1-4842-5187-4_15

15. Classes

Will Briggs¹ 

(1)

Lynchburg, VA, USA

 

Till now what we’ve covered has been essentially C with a few tweaks, notably cin and cout. Now it’s time to add the thing that puts the + in C++: classes.

Writing classes

Here’s a class type to store a calendar date.

class Date

{

      int days_;

      int months_;

      int years_;

};

...

Date arrival;//Variables of a class type are called "objects"

             //Using the term makes you sound smart at job interviews

We could have done that with a struct. As with structs, we can declare variables of this type, pass them as parameters, get at the parts with “ . ”, and so on – it looks much the same. But we’re about ...