Jevgeni Astanovski wrote:
... Is my understanding correct, that if *fpr is static,
then it is initialized to NULL and if automatic - no?


For the C language, a variable is only initialized if you code an initializer to the definition.

_RFILE *fp = NULL;

If fp is static, it would be set to NULL once, during activation. If it is automatic, it would be fresh storage set to NULL every time the function gets called.

If you don't code an initializer, it might be NULL, or it might be set to a pointer. This is true whether it is static or automatic.

In your original code, it didn't matter how it was initialized, since you always set it immediately. But if you make it static, you'll have to add an initializer if you want to test it before setting it.


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