Exercise - Pointer
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  1. #1
    Join Date
    Oct 2013
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    4

    Exercise - Pointer

    Q1: Trace the partial of program below:

    1. int v = 8, *r, *s;
    2. int *p;
    3. int q = 100;
    4. p = &q;
    5. r = p;
    6. *p = 20;
    7. p = new int;
    8. *r = 30;
    9. q = v;
    10. s = p;
    11. *s = 50;

    What are the last values of *p, q, *r, v and *s?
    my answer :
    *p = 20
    q = ?
    *r = 30
    v = ?
    *s = 50

    i can't find q and v. But, if q will point whatever v point, so, the value of q is 8 ? am i right ?



    Q2 = Given the following codes:
    1. int *p , *q , v , nom[5];
    2. p = &v;
    3. *p = 12;
    4. q = p;
    5. nom[0] = *q;
    6. p = nom;
    7. p++;
    8. nom[2] = 12;
    9. *p = 13;
    10. *q = 10;
    11. v = 11;
    12. *(p+3) = 16;
    13. p = &nom[3];
    14. *p = 10;
    15. p--;

    What are the last values of *p, *q, v and nom ?

    my answer :
    *p = 10
    *q = 10
    v = 11
    nom = ?

    i can't find nom .

    Q3 : Given below declaration :
    Code:
    struct Node
    {
           int  value;
           Node  * next;
     };
    In the main function, the following codes are given:
    1. Node *q, *r;
    2. Node *p = new Node; //address of this new Node adalah 10000
    3. q = r = NULL;
    4. p -> value = 9;
    5. p -> next = NULL;
    6. q = new Node; //address of this new Node adalah 10050
    7. p->next = q;
    8. p->next->value = 8;
    9. q->next = new Node; //address of this new Node adalah 10100
    10. r = q;
    11. r-> value = 10;
    12. q->next->value = 11;
    13. q = q-> next;
    14. q -> next = NULL;

    What are the last values of p->value and q->value ?

    my answer :

    p->value = 9
    q->value = NULL

    Anyway, is it relevant my answer?
    Last edited by khelkely; October 17th, 2013 at 09:57 PM.

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