???? - ?? C ?? 2

1
Chapter 4 ????

• 4.1 ??????
• 4.2 ????
• 4.3 ??????
• 4.4 ???????

2

• ????
• ????(linked list)??????????,?????????????????
• ?????????????(single linked list)?????(circular
  linked list)???????(doubly linked
  list),?????????????????????????,???????????,??????
  ?????????????????

3
4.1 ??????

• ??????????,????(insert)???(delete)????(node)??????
  ,???????a,b,d,e????,??c?????,????????,????d,e????,
  ???c????????,??????????????,?????????????????????
  ??????(linked list)?

4
4.1 ??????

• ????????????????????,????????(pointer)???????
• ???????????(node)????????,?????(data)????(next)?
  ,?????????struct node ??,?????

5
4.1 ??????

• ??? Aa, b, c, d,???????
• head?????????,????????data??????????,????????????
  ??

6
4.1 ??????

• 4.1.1 ????
• 1.????????????????

7
4.1 ??????

• ????x?????????,?????
• x(struct node) malloc(sizeof(struct node))

8
4.1 ??????

• (x-gtnexthead-gtnext / /

?
9
4.1 ??????

• head-gtnextx / /

?
10
4.1 ??????

• 2.????????????????

11
4.1 ??????

• ????x????????,?????
• x(struct node )malloc(sizeof(struct node))
• x-gtnextNULL

12
4.1 ??????

• ???????????????,???????????????????

13
4.1 ??????

• p-gtnextx

14
4.1 ??????

• ????????????????????????,?data??????????

15
4.1 ??????

• ?????ptr?data????75,????????????????????????,????7
  5????80?70??,??????????????

16
4.1 ??????

• ??prev?current???????,prev????current????

17
4.1 ??????

• ?????????ptr??????prev??? ptr-gtnextcurrent
  / ? / prev-gtnextptr / ? /

?
?
18
4.1 ??????

• 4.1.2 ????
• ?????????????????

19
4.1 ??????

• ????????????
• phead-gtnext
• head-gtnextp-gtnext

20
4.1 ??????

• free(p) ??free(p)???p?????

21
4.1 ??????

• ?????????????????

22
4.1 ??????

• ???????????????? ?????,????
• phead-gtnext

23
4.1 ??????

• prev-gtnextNULL
• free(p)

24
4.1 ??????

• ?????????????????????????
  ??current?prev,??????? ????(current)?????
  (prev),??prev????current?
• ????????????

25
4.1 ??????

• ????Mary???del_data?????Mary,??????????????cur
  rent????Mary???,?prev??John??,??current???????
  ?

26
4.1 ??????
?
27
4.1 ??????

• 4.1.3 ?????????????
• ?????????

28
4.1 ??????

• ?x?y?????z??,?????
• if(x-gtnextNULL)zy
• if(y-gtnext NULL)zx
• zxcx-gtnext

29
4.1 ??????
30
4.1 ??????

• 4.1.4 ??????
• ????,?????(invert)?????????????,??,???????????????
  ???????,??????????,??????????

31
4.1 ??????

• ????????

32
4.1 ??????

• ?????????????????
• phead-gtnext
• currentNULL

33
4.1 ??????

• while(p ! NULL) prevcurrent currentp
  pp-gtnext current-gtnextprev

34
4.1 ??????

• ??????????p??,current???prev????????????????,????

35
4.1 ??????

• ?????p NULL?,????

36
4.1 ??????

• ??,??head-gtnextcurrent
• ??????????????????????????????

37
4.1 ??????

• 4.1.5 ???????
• ???????????????,???????????????

38
4.1 ??????

• ???????????????? (p ! NULL)
• ????count?????????head?????????,????????

39
4.2 ????

• ??????????????????head???,?????????(circular
  list),?????
• ?????????????????????????????x1?

40
4.2 ????

• 4.2.1 ????
• ?????????????????????????
• ??malloc?????????

41
4.2 ????

• ?????????x????????????????

42
4.2 ????

• ??(1)(2)???????????????????

43
4.2 ????

• ?????????????

44
4.2 ????

• ??????????????????,???????????

45
4.2 ????

• 4.2.2 ?????
• ??????????????????

46
4.2 ????

• ???????????????

• ??p??????,?????????????

47
4.2 ????

• ?????????????????

48
4.2 ????

• ?????????????????

49
4.2 ????

• ????????????????????,???????

50
4.2 ????

• 4.2.3 ??????????
• ???????????????????,?????????,??????????

51
4.2 ????

• ???????????
• ?????????????????????

52
4.2 ????

• ?????????????????????,??????????,???Big-O?O(n),???
  ?????????,??????????Big-O?O(1),???????,????????,??
  ???????????????

53
4.2 ????

• ???free(q)???????????AV????

54
4.2 ????

• 4.2.4 ?????????
• ?????????,????????????????????

55
4.3 ??????

• ??????(doubly linked list)?????????????,
• ?????(LLINK)
• ????(DATA)
• ?????(RLINK)
• ???????

56
4.3 ??????

• ??LLINK??????,?RLINK????????
• ????????????????,???????????????????

57
4.3 ??????

• ??????????????
• ??ptr??????????,?ptr ptr-gtllink-gtrlink
  ptr-gtrlink-gtllink
• ?????????????,?????????

58
4.3 ??????

• 4.3.1 ????
• ?????????????????????????

59
4.3 ??????

• ???????????????x??????

60
4.3 ??????
61
4.3 ??????

• ????????????????????????

62
4.3 ??????

• ???????????????x???????

63
4.3 ??????
64
4.3 ??????

• ????(2), (3)????????

65
4.3 ??????

• ???????????????????????,????????????,???????????
  ??????(??????)

66
4.3 ??????
67
4.3 ??????
68
4.3 ??????

• 4.3.2 ????
• ???????????,????

69
4.3 ??????
70
4.3 ??????

• ???????????,?????????????

71
4.3 ??????
72
4.3 ??????

• ????????????????
• ???del_dat?cd,???????

73
4.3 ??????

• ??current????????,?prev???current??????

74
4.3 ??????
75
4.4 ???????

• 4.4.1 ?????????
• ?????????????????,??,?????????????????????,???????
  ????????????????????

76
4.4 ???????

• 4.4.2 ?????????
• ???????????????,????????????????????,?????????????

77
4.4 ???????

• 4.4.3 ?????
• ??????????????????????????????,???????
• COEF???????,EXP???????,?LINK???????????

78
4.4 ???????

• ??????? A3x142x81,???????

79
4.4 ???????

• ???????????????
• A3x142x81 B8x14-3x1010x6

80
4.4 ???????

• ??A?B??????????EXP???(EXP(p) EXP(q)),???????C??,
  ??p?q???????????

81
4.4 ???????

• EXP(p)8ltEXP(q)10????B???????????C???,??q????????
  ??

82
4.4 ???????

• ??EXP(p)8gtEXP(q)6,???A???????????C???,p?????????
  ?

83
4.4 ???????

• ??????C????
• C11x14-3x102x810x61