static and global variable inside a class

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I came to see one class say CMyClass. There inside CMyClass.cpp is a global variable defined.
And probably also used somewhere else. I was curious what is the point of having this global variable inside class when one could also declare say a static member variable inside it? (what's the difference? they both enjoy class scope right? (by class scope I mean what is valid with static variables, e.g., one instance through all class objects) ).

Posted 21-May-13 20:47pm

Dan page

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Captain Price 22-May-13 3:04am

"A Global variable inside a class", What do you mean ?

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CPallini · Answer 1 · 2013-05-21T21:13:00

Solution 1

You cannot have a global variable inside a class (all the variables inside the class are class members).
Class static variables are often used instead of global variables (see, for instance, "What's a good coding standard for using global variables?"[^]).

Posted 21-May-13 21:13pm

CPallini

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Dan page 22-May-13 3:22am

hmmm. I see. Now, it seemed strange to me. Imagine there is a class Settings. Now inside the Settings.cpp I see a declaration: (just after includes) Settings _settings; Then elsewhere in another class I see _settings.someFun() - directly being used.

CPallini 22-May-13 4:01am

Declared that way, _settings is a global variable.