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C | Arrays | Question 6

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Assume the following C variable declaration
int *A [10], B[10][10];  

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;

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Last Updated : 28 Jun, 2021
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