1. Advanced Data Structure using C++

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LECTURE NOTES OF ADVANCED DATA STRUCTURE (MT-CSE 110) Thus, associated with each data item in a linked list representation is a pointer to the next item. This pointer is often referred to as a link. In general, a node is a collection of data, Data1,…,Datan and links Link1,..,Linkm. Each item in a node is called a field. A field contains either a data item or a link. Linked Structure linked list ‐ A collection of items, called nodes, that can be physically scattered about memory, not necessarily in consecutive memory locations. Programmers responsible for maintaining logical order by chaining nodes together. Each node has two components: • The element (data object) ‐ (ItemType) • The link ‐ gives the location of the next node in the list ‐ establishes the logical order. Node : Dynamic representation of a list: Prepared By : Er. Harvinder Singh Assist Prof., CSE, H.C.T.M (Kaithal) Page ‐ 102 ‐
LECTURE NOTES OF ADVANCED DATA STRUCTURE (MT-CSE 110) Dynamic Data Structure ‐ A data structure that can expand and contract during execution. Dynamic Linked List ‐ A linked list composed of dynamically allocated nodes that are linked together by pointers. External Head Pointer ‐ A pointer variable that points to the first node in a dynamic linked list. EXAMPLE A hospital ward contains 12 beds, of which 9 are occupied as shown in fig. Suppose we want an alphabetical listing of the patients. This listing may be given by the pointer field, called Next in fig. We use the variable START to point to the first patient. Hence START contains 5, since the first patient, Adams, occupies bed 5. Also, Adams’s pointer is equal to 3, since Dean, the next patient, occupies bed3; Dean’s pointer is 11, since Fields, the next patient, occupies bed 11;and so on. The entry for the last patient(Samuels) contains the null pointer , denoted by 0 . Representation of linklists in memory Let LIST be a linked list. Then LIST will be maintained in memory, unless otherwise specified or implied, as follows. First of all, LINK requires two linear arrays‐ we will call them here INFO and LINK‐ such that INFO[k] and LINK[k] contain, respectively, the information part and the next pointer field of a node of LIST. As noted above, LIST also requires a variable name‐ such as START‐which contains the location of the beginning of the list, and a nextpointer sentinel‐denoted by NULL‐which indicates the end of the list. Since the subscripts of the arrays INFO and LINK will usually be positive, we will choose NULL=0, unless otherwise stated. Types Of link list Structures : Circular linked list structure. Prepared By : Er. Harvinder Singh Assist Prof., CSE, H.C.T.M (Kaithal) Page ‐ 103 ‐
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ADVANCED DATA STRUCTURE NOTES (MT
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COLLISION LECTURE NOTES OF ADVANCED
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