Linear linklist search
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The document describes a search algorithm to find the location of an item in a linked list. It involves the following steps: 1. Initialize a pointer PTR to the start node of the linked list. 2. Repeat step 3 while PTR is not NULL. 3. If the item is greater than the info at PTR, set PTR to the link at PTR. Else if the item is equal to the info at PTR, set the location to PTR and exit. Else set the location to NULL and exit.
![100 21
INFO LINK
300 41
200 31
400 51
500 NULL
41
21
31
51
3. If ITEM>INFO[PTR]
START=11
ITEM=300
LOC=?
11
Add
PTR=
Means
300>100](https://image.slidesharecdn.com/linearlinklistsearch-160226011817/85/Linear-linklist-search-4-320.jpg)
![100 21
INFO LINK
300 41
200 31
400 51
500 NULL
41
21
31
51
3. If ITEM>INFO[PTR] then
Set PTR:= LINK[PTR]
START=11
ITEM=300
LOC=?
11
Add
PTR=
Means
300>100](https://image.slidesharecdn.com/linearlinklistsearch-160226011817/85/Linear-linklist-search-5-320.jpg)
![100 21
INFO LINK
300 41
200 31
400 51
500 NULL
41
21
31
51
3. If ITEM>INFO[PTR] then
Set PTR:= LINK[PTR]
START=11
ITEM=300
LOC=?
11
Add
PTR=
300>300](https://image.slidesharecdn.com/linearlinklistsearch-160226011817/85/Linear-linklist-search-6-320.jpg)
![100 21
INFO LINK
300 41
200 31
400 51
500 NULL
41
21
31
51
3. If ITEM>INFO[PTR] then
Set PTR:= LINK[PTR]
Else if ITEM=INFO[PTR]
SET LOC=PTR and EXIT
START=11
ITEM=300
LOC= 21
11
Add
PTR=
300=300](https://image.slidesharecdn.com/linearlinklistsearch-160226011817/85/Linear-linklist-search-7-320.jpg)
![100 21
INFO LINK
300 41
200 31
400 51
500 NULL
41
21
31
51
3. If ITEM>INFO[PTR] then
Set PTR:= LINK[PTR]
Else if ITEM=INFO[PTR]
SET LOC=PTR and EXIT
Else Set LOC:= NULL and Exit
START=11
ITEM=300
LOC= 21
11
Add
PTR=
300=300](https://image.slidesharecdn.com/linearlinklistsearch-160226011817/85/Linear-linklist-search-8-320.jpg)
![100 21
INFO LINK
300 41
200 31
400 51
500 NULL
41
21
31
51
1.[OVERFLOW?] IF AVAIL=NULL, the Write: OVERFLOW
START=11
11
START
AVAIL](https://image.slidesharecdn.com/linearlinklistsearch-160226011817/85/Linear-linklist-search-10-320.jpg)
![100 21
INFO LINK
300 41
200 31
400 51
500 NULL
41
21
31
51
4. SET LINK[NEW]=START
START=11
11
NEW 23 11
START](https://image.slidesharecdn.com/linearlinklistsearch-160226011817/85/Linear-linklist-search-12-320.jpg)
Linear linklist search
- 1. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 11 41 21 31 51 Add SRCHSL (INFO, LINK, START, ITEM, LOC) START=11 ITEM=300 LOC=?
- 2. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 1. Set PTR:= START START=11 ITEM=300 LOC=? 11 Add PTR=
- 3. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 2. Repeat Step 3 while PTR≠ NULL START=11 ITEM=300 LOC=? 11 Add PTR=
- 4. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 3. If ITEM>INFO[PTR] START=11 ITEM=300 LOC=? 11 Add PTR= Means 300>100
- 5. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 3. If ITEM>INFO[PTR] then Set PTR:= LINK[PTR] START=11 ITEM=300 LOC=? 11 Add PTR= Means 300>100
- 6. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 3. If ITEM>INFO[PTR] then Set PTR:= LINK[PTR] START=11 ITEM=300 LOC=? 11 Add PTR= 300>300
- 7. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 3. If ITEM>INFO[PTR] then Set PTR:= LINK[PTR] Else if ITEM=INFO[PTR] SET LOC=PTR and EXIT START=11 ITEM=300 LOC= 21 11 Add PTR= 300=300
- 8. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 3. If ITEM>INFO[PTR] then Set PTR:= LINK[PTR] Else if ITEM=INFO[PTR] SET LOC=PTR and EXIT Else Set LOC:= NULL and Exit START=11 ITEM=300 LOC= 21 11 Add PTR= 300=300
- 9. Else if if(ccondition) { Statement; } else if(condition 2) { Statement2; } else { Statement3 }
- 10. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 1.[OVERFLOW?] IF AVAIL=NULL, the Write: OVERFLOW START=11 11 START AVAIL
- 11. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 2. SET NEW:= AVAIL AND AVAIL:=LINK AVAIL START=11 11 START AVAIL LINK NEW
- 12. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 4. SET LINK[NEW]=START START=11 11 NEW 23 11 START
- 13. 100 21 INFO LINK 300 41 200 31 400 51 500 NULL 41 21 31 51 5. SET START=NEW START=11 11 NEW 23 11 START