Discussion
Under which of the following conditions, the size of an one-dimensional array need not be specified?
Answer: D
Correct answer: All of the above
All three permit the size to be left out. With an initialiser the compiler counts the values. In a declaration such as extern int a[]; the size comes from the definition elsewhere. And as a formal parameter the array is adjusted to a pointer, so no bound is needed - nor at the call site, where the name is passed alone.
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