Using Singletton Pattern for global variables

[tbscope]

static and editing very rarely go together in one sentence.
Except when pointing out that static is static and can't be edited.

static int myStaticInt = 5;
cout << "my static int =" << myStaticInt;

static int myStaticInt = 5;
cout << "my static int =" << myStaticInt;

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That's all you can do with a static variable.