1
00:00:00,000 --> 00:00:03,160
>> DAVID J. Malan: Tuseme sisi unataka kuandika
mpango huo anauliza kila mtu katika

2
00:00:03,160 --> 00:00:06,740
chumba kwa umri wao, na kisha prints
nje umri gani watu hao kuwa na

3
00:00:06,740 --> 00:00:07,520
mwaka hivyo?

4
00:00:07,520 --> 00:00:09,900
Sasa, ni wazi hesabu kwa hii
tatizo ni kwenda kuwa na haki

5
00:00:09,900 --> 00:00:10,660
moja kwa moja.

6
00:00:10,660 --> 00:00:14,090
Lakini swali la kuvutia, kama sisi
hawajui mapema jinsi watu wengi

7
00:00:14,090 --> 00:00:16,790
ni kwenda kuwa katika nafasi hii, jinsi
tunaweza kwenda juu ya kuhifadhi

8
00:00:16,790 --> 00:00:17,980
yote ya umri wao?

9
00:00:17,980 --> 00:00:19,680
Naam, hebu tuangalie.

10
00:00:19,680 --> 00:00:22,760
>> Hebu tuanze kwa mara ya kwanza na kusababisha
user, kama mimi tumefanya hapa, kwa

11
00:00:22,760 --> 00:00:26,410
idadi ya watu katika chumba cha kutumia
GetInt na do-kitanzi wakati ili

12
00:00:26,410 --> 00:00:28,220
kupata integer n.

13
00:00:28,220 --> 00:00:32,310
Tuseme sisi sasa nataka kuuliza kila vile
mtu katika chumba kwa umri wao.

14
00:00:32,310 --> 00:00:35,820
Naam, silika yangu itakuwa kutumia
kitanzi kwa kufanya hivyo kusababisha, lakini mimi pia

15
00:00:35,820 --> 00:00:37,840
haja mahali pa kuhifadhi
milele wale watu.

16
00:00:37,840 --> 00:00:40,760
Na hisia za yangu ya kwanza kutakuwa na
kutumia kutofautiana kwa kwanza

17
00:00:40,760 --> 00:00:43,690
umri wa mtu, mwingine variable
kwa umri wa mtu pili ya,

18
00:00:43,690 --> 00:00:44,780
aina ya pamoja na mistari.

19
00:00:44,780 --> 00:00:46,230
Int umri -

20
00:00:46,230 --> 00:00:48,850
vizuri, hebu kuiita 1 kwa
mtu wa kwanza.

21
00:00:48,850 --> 00:00:51,480
Int umri wa miaka 2 kwa mtu wa pili.

22
00:00:51,480 --> 00:00:53,980
Int umri 3 kwa ajili ya mtu wa tatu.

23
00:00:53,980 --> 00:00:56,750
>> Lakini kusubiri dakika, hii si labda
njia bora kwenda chini.

24
00:00:56,750 --> 00:01:00,620
Kwa sababu mimi sijui kabla ya
kuandika na kuandaa mpango huu jinsi

25
00:01:00,620 --> 00:01:02,330
watumiaji wengi huko ni kwenda kuwa.

26
00:01:02,330 --> 00:01:06,590
Na zaidi ya hayo, kama kuna wengi kama
Watumiaji 100, kutangaza 100 vigezo

27
00:01:06,590 --> 00:01:10,350
aina ya oddly jina lake kama hii haina
kujisikia kama design nzuri sana.

28
00:01:10,350 --> 00:01:14,430
>> Naam, nashiriki kuna mwingine
aina ya variable kuitwa safu kwamba

29
00:01:14,430 --> 00:01:18,710
inaruhusu sisi kuhifadhi idadi yoyote ya ints
ndani yake, hata kama hatujui

30
00:01:18,710 --> 00:01:22,190
wakati wa kuandika mpango wangu wangapi
ints kama sisi ni kwenda haja ya.

31
00:01:22,190 --> 00:01:25,970
Basi hebu backtrack na kufuta hizi
ints kadhaa, na badala yake badala yake

32
00:01:25,970 --> 00:01:29,620
na kutofautiana na mtu mmoja aitwaye,
kusema, umri, wingi.

33
00:01:29,620 --> 00:01:33,420
Lakini hebu zaidi bayana juu ya mstari huu
wa kanuni katika mabano mraba kwamba sisi

34
00:01:33,420 --> 00:01:35,460
wanataka n ints.

35
00:01:35,460 --> 00:01:39,570
Kwa hiyo, sisi kwa pamoja
rejea ints haya kama milele.

36
00:01:39,570 --> 00:01:43,490
>> Sasa katika muda tu mimi utakuwa na uwezo wa kupata
katika kila moja ya ints katika safu hii

37
00:01:43,490 --> 00:01:47,270
vile vile kwa njia ya mraba bracket
nukuu, kuanzia saa 0.

38
00:01:47,270 --> 00:01:51,720
Basi hebu kuendelea sasa katika kitanzi
haraka watumiaji kwa umri wao.

39
00:01:51,720 --> 00:01:54,780
Kwa int mimi kupata 0.

40
00:01:54,780 --> 00:01:59,464
Mimi ni chini ya N, idadi ya watu
katika chumba, mimi pamoja na plus.

41
00:01:59,464 --> 00:02:06,610
>> Na sasa ndani ya kitanzi hii, hebu sema
printf umri wa mtu posta, asilimia mimi

42
00:02:06,610 --> 00:02:09,430
ni placeholder, comma.

43
00:02:09,430 --> 00:02:13,210
Na sasa, badala ya kuanza kuhesabu kutoka
0 katika programu yenyewe, hebu katika

44
00:02:13,210 --> 00:02:17,180
angalau nyongeza mimi na 1 ili kawaida
mtu kutumia mpango huu

45
00:02:17,180 --> 00:02:20,120
hana kuhesabu kama
kompyuta mwanasayansi nguvu.

46
00:02:20,120 --> 00:02:26,130
Hebu sasa kufanya milele, bracket mimi, na hivyo
kubainisha kwamba i-waliofikia umri wa kwenda katika yetu

47
00:02:26,130 --> 00:02:31,480
safu ya umri ni kwenda kupata
thamani ya kurudi kwa GetInt.

48
00:02:31,480 --> 00:02:37,800
>> Sasa chini ya kitanzi hii, hebu kuendelea
kudhani kwamba wakati baadhi unapita.

49
00:02:37,800 --> 00:02:41,690
Na hebu sasa kuendelea katika mwingine kitanzi
kwa kweli umri kila mtu katika chumba

50
00:02:41,690 --> 00:02:42,800
kwa mwaka mmoja.

51
00:02:42,800 --> 00:02:48,110
Hivyo tena, kwa int mimi kupata 0, mimi ni chini ya
kuliko N, idadi ya watu katika

52
00:02:48,110 --> 00:02:49,680
chumba, mimi pamoja na plus.

53
00:02:49,680 --> 00:02:57,210
>> Na sasa ndani ya kitanzi hii, hebu sema
printf mwaka mmoja kuanzia sasa mtu posta,

54
00:02:57,210 --> 00:03:00,990
asilimia mimi ni placeholder, mapenzi
kuwa, asilimia mimi ni mwingine

55
00:03:00,990 --> 00:03:03,210
placeholder, umri wa miaka.

56
00:03:03,210 --> 00:03:07,230
Na kisha kuziba ndani ya wale
placeholders, hebu kwanza kusema mimi pamoja na

57
00:03:07,230 --> 00:03:11,220
1, ili tena sisi kuanza kuhesabu
kwa mtumiaji kutoka 1.

58
00:03:11,220 --> 00:03:18,630
Na kisha hebu kuziba katika umri mtu huyo
kama umri bracket mimi plus 1, na hivyo

59
00:03:18,630 --> 00:03:23,740
kubainisha go kupata umri i-th katika yetu
safu ya milele, kuongeza 1 hiyo, na kisha

60
00:03:23,740 --> 00:03:28,370
kuingiza kiasi kwamba ndani ya placeholder yetu,
paren karibu, semicolon.

61
00:03:28,370 --> 00:03:33,280
>> Hebu sasa kukusanya mpango huu na kufanya
milele, na hebu kukimbia kwa dot

62
00:03:33,280 --> 00:03:34,990
kufyeka milele.

63
00:03:34,990 --> 00:03:38,770
Na kudhani kwamba kuna tatu tu
watu katika chumba, na mtu ni 18,

64
00:03:38,770 --> 00:03:40,700
mtu ni 19, mtu ni 20.

65
00:03:40,700 --> 00:03:45,350
Naam, katika mwaka, kila mmoja folks wale
ni kwenda kuwa 19, 20, na 21,

66
00:03:45,350 --> 00:03:46,600
mtiririko huo.

67
00:03:46,600 --> 00:03:48,948