C Quiz – 112 | Question 2

Pick the best statement for the below program snippet:

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struct {int a[2];} arr[] = {1,2};

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(A) No compile error and it’ll create array arr of 2 elements. Each of the element of arr contain a struct field of int array of 2 elements. arr[0]. a[0] would be 1 and arr[1].a[0] would be 2.
(B) No compile error and it’ll create array arr of 2 elements. Each of the element of arr contain a struct field of int array of 2 elements. arr[0]. a[0] would be 1 and arr[0].a[1] would be 2. The second element arr[1] would be ZERO i.e. arr[1].a[0] and arr[1].a[1] would be 0.
(C) No compile error and it’ll create array arr of 1 element. Each of the element of arr contain a struct field of int array of 2 elements. arr[0]. a[0] would be 1 and arr[0].a[1] would be 2.


Answer: (C)

Explanation: Since size of array arr isn’t given explicitly, it would be decided based on the initialization here. Without any curly braces, arr is initialized sequentially i.e. arr[0].a[0] would be 1 and arr[0].a[1] would be 2. There’s no further initialization so size of arr would be 1. Correct answer is C.

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