Pick the best statement for the below program:
#include "stdio.h"
int main()
{
struct {int a[2], b;} arr[] = {[0].a = {1}, [1].a = {2}, [0].b = 1, [1].b = 2};
printf("%d %d %d and",arr[0].a[0],arr[0].a[1],arr[0].b);
printf("%d %d %d\n",arr[1].a[0],arr[1].a[1],arr[1].b);
return 0;
}
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(A) Compile error because struct type (containing two fields i.e. an array of int and an int) has been specified along with the definition of array arr[] of this struct type.
(B) Compile error because of incorrect syntax for initialization of array arr[].
(C) No compile error and two elements of arr[] would be defined and initialized. Output would be “1 0 1 and 2 0 2”.
(D) No compile error and two elements of arr[] would be defined and initialized. Output would be “1 X 1 and 2 X 2” where X is some garbage random number.
Answer: (C)
Explanation: In C, designators can be used to provide explicit initialization. For an array, elements which aren’t initialized explicitly in program are set as ZERO. That’s why correct answer is C.
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