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GO Classes DPP | C programming | Pointers | Dennis Richie

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Which of the following expressions is NOT equivalent to ${ }^*(\operatorname{arr}+3)$ where arr is an integer array?

  1. $\operatorname{arr}[3]$
     
  2. *(&arr $[0]+3)$
     
  3. $* a r r+3$
     
  4. $*(3+a r r)$

1 Answer

4 4 votes
Ans: Option C

A) Correct,    $\text{arr}[i] = *(\text{arr} + i)$
B) Correct,    array name $(\text{arr})$ represents address of first element $\&\text{arr}[0]$

C) Incorrect,  $[*\text{arr} + 3]$ first dereferences to $\text{arr}[0]$ then we add 3. which doesn't match
D) Correct,    $\text{arr}[3] = 3[\text{arr}] = *(3 + \text{arr})$
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