Discussion
Size of the array need not be specified, when
Answer: B
Correct answer: All the above
The size may be left out in all three cases. In a definition with an initialiser, int a[] = {1,2,3};, the compiler counts the initialisers. In a formal parameter, void f(int a[]), the array is adjusted to a pointer and any bound is ignored. In a declaration, extern int a[];, the definition elsewhere supplies the size.
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