Assume the following C variable declaration
int *A [10], B[10][10];
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Of the following expressions
I A[2]
II A[2][3]
III B[1]
IV B[2][3]
which will not give compile-time errors if used as left hand sides of assignment statements in a C program (GATE CS 2003)?
(A) I, II, and IV only
(B) II, III, and IV only
(C) II and IV only
(D) IV only
Answer: (A)
Explanation: See following for explanation.
int main()
{
int *A[10], B[10][10];
int C[] = {12, 11, 13, 14};
/* No problem with below statement as A[2] is a pointer
and we are assigning a value to pointer */
A[2] = C;
/* No problem with below statement also as array style indexing
can be done with pointers*/
A[2][3] = 15;
/* Simple assignment to an element of a 2D array*/
B[2][3] = 15;
printf("%d %d", A[2][0], A[2][3]);
return 0;
}