How is a class diagram actually any different to just looking at the class definition with all the functions collapsed? I’ve been asked to write some and realized that this is all just .. read the source .. it has comments. What’s the point of a class diagram, how is it different to even minorly commented definitions, and what makes a good class diagram better than others?
Edit: Yes, the source already exists, and did so long before the class diagrams.
Another edit: People have been talking about visual vs textual tastes. That’s not the definition of class diagram I was given. It’s still purely textual. The sample class diagram is a bunch of text, that resembles the source code with the function definitions cut. That’s the reason that I asked. If it was a genuine diagram, I could understand.
If you have one or two classes, that does not make a difference.
If you have a complex object model, things change.
And, at least for me, it is easy to look first at a diagram in order to look for what I want instead of looking at a bunch of source files.
Also seeing the classes on a picture and their relations helps to understand the ideas of the project.