Re: What is OOP?

On Sun, 2024-12-01 at 20:11 -0800, Chris M. Thomasson wrote:

On 12/1/2024 9:17 AM, wij wrote:

There are several understandings:
https://www.quora.com/As-an-experienced-OOP-programmer-in-your-opinion-whats-the-biggest-problem-of-OOP-object-oriented-programming
 
...
OO can have many meaning. I took OO to mean object, the basic entity of the
programming model and the operation of the object. The concept, as foundmental,
has to be solid, practical and easily usable. Otherwise, more codes and efforts
will be needed latter to fix it, making the original goal ,practically, a lie.
IOW, (nearly) a flawless model is all the basics. ...
https://sourceforge.net/projects/cscall/files/MisFiles/ClassGuidelines.txt/download

[...]
 
struct object
{
     // [...]
 
     void do_it();
     void wink();
     void laugh();
     void pose();
};
 
 
? OOP right there in a sense?

NOPE.

Snippet from the classguidelines of libwy:
...
 Const member functions:
   A set of const function members, often referred to as property or attribute
   members, defines whether or not two objects function 'identically'. In
   general, a minimum set of such members must exist. These members are often
   in complexity O(1), and provide the basic proofs that the class is properly
   designed.
...

If there is no attribute members (const function member), how do we know whether
the class is properly designed or not? So, bascially, as long as default ctor
exists, there is a member 'bool is_default() const' to confirm it. The 2nd
question is how do we know whether the copy constructor does its job? Then,
there is a series of setters and getters... basically, verifiable by each other.
If you can make the function of these sets of members concise, efficient and
consistent, the concept of the class in your brain is probably right, otherwise
not right. This is the key point of libwy's OOP.

With your example (lacks ctors, but important), what is 'do_it()' and
others? You need some attribute members (getters) to confirm what those
non-const members do are exactly what they claim doing. So you also need other
attributes e.g. is_wink(), is_laugh() and is_pose(). Then, what the copy ctor
should do is clear. Then, assignment operator...,etc.
Whenever you have an idea, concept, try make it a 'complete' class (sometimes 
the idea does not fit as a class). Follow the basic rule, then, class design,
the program, will be lots easier and fun.