answer is:D . Please explain why the answer is what is is thoroughly. I am tryin

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answer is:D .

Please explain why the answer is what is is thoroughly. I am trying to study for my test. I will make sure to thumbs up! thank you very much for your time

3. Which of the following loops correctly uses p to move through the nodes of the linked list? Assume that the structure is declared as: struct node data stored in the node int value; struct node next pointer to the next node and the linked list pointed to by list. a) while (p NULL) p++; b) while (p NULL) p p-> next; c) for (p NULL; p NULL; p p->next) d) for (p list; p NULL; p p- next) Answer

Explanation / Answer

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Answer:
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   d) for(p=list;p!=NULL,p=p->next)
  

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Explanation:
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   In the given code snippet
      
   option d) for(p=list;p!=NULL;p=p->next)
  
       Here first we are initializing the pointer to refer the linked list i.e list
      
       p!=NULL will be checked for each time entering of the loop, till pointer p becomes
       NULL for loop will continue.
      
       Once the inside for loop computation is done, pointer is incremented using
       p=p->next operation present in for loop.
      
       Hence option d is the correct answer.
      
   When we compare option a and b using while loop there is no initializaion of pointer p to list
   Hence option a and b are wrong. Option c also incorrect since initializaion we are doing with NULL.
  
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