1
00:00:00,000 --> 00:00:00,160

2
00:00:00,160 --> 00:00:04,010
>> SPIKA 1: Kwa hiyo mimi najisikia kama huwa na
kuandika printf hujambo dunia au printf

3
00:00:04,010 --> 00:00:08,160
hujambo asilimia s mara nyingi kabisa katika mazingira
ambapo nataka magazeti nje

4
00:00:08,160 --> 00:00:11,360
kamba, wakati mwingine kuuliza
user sehemu ya kamba hiyo.

5
00:00:11,360 --> 00:00:14,980
Naam, si ingekuwa ni kuwa nzuri kama sisi kuundwa
kazi ya yetu wenyewe kuitwa,

6
00:00:14,980 --> 00:00:19,900
kusema, magazeti jina, ambao lengo katika maisha
ni tu na magazeti hujambo comma

7
00:00:19,900 --> 00:00:24,560
hivyo-na-hivyo kwa kukubali ili-na-hivyo
kama hoja ya kazi hiyo?

8
00:00:24,560 --> 00:00:29,220
Tunaweza kutangaza kazi ya yetu wenyewe
kama tu tunaweza katika Scratch kama ifuatavyo.

9
00:00:29,220 --> 00:00:35,280
>> Kwa maneno mengine, tuseme Ningependa
printf jina lako na kisha kuuliza user

10
00:00:35,280 --> 00:00:39,470
kwa jina lake na kamba
s ni sawa na GetString.

11
00:00:39,470 --> 00:00:42,060
Na kisha Mimi nataka kuwaita kazi
aitwaye magazeti jina

12
00:00:42,060 --> 00:00:44,340
kupita s kama mchango wake.

13
00:00:44,340 --> 00:00:47,770
>> Sasa kwa bahati mbaya, hakuna kazi
kuitwa jina magazeti katika C au katika

14
00:00:47,770 --> 00:00:48,950
cs50 maktaba.

15
00:00:48,950 --> 00:00:51,220
Lakini hakuna jambo, kwa sababu sisi
wanaweza kufanya hivyo wenyewe.

16
00:00:51,220 --> 00:00:54,560
Kutangaza kazi ya yetu wenyewe na
kisha kutekeleza hilo, tunaweza tu kufanya

17
00:00:54,560 --> 00:00:59,000
baadhi ya chumba katika faili hii na kutangaza
kazi hii kama ifuatavyo, utupu -

18
00:00:59,000 --> 00:01:01,900
ikimaanisha kwamba kazi si
kweli kwenda na kurudi kitu,

19
00:01:01,900 --> 00:01:03,890
hata kama itakuwa na
upande athari -

20
00:01:03,890 --> 00:01:08,030
magazeti jina, na kisha hebu bayana katika
mabano kwamba jina magazeti anatarajia

21
00:01:08,030 --> 00:01:09,680
Hoja ya kamba aina.

22
00:01:09,680 --> 00:01:12,180
Na kwa ujumla, sisi itabidi kufikiri
ya kwamba kama jina.

23
00:01:12,180 --> 00:01:15,140
>> Na hebu kufungua brace wetu
na karibu brace yetu.

24
00:01:15,140 --> 00:01:21,930
Na kisha printf ndani ya hujambo comma
asilimia s mpya line comma jina.

25
00:01:21,930 --> 00:01:24,570
Kwa maneno mengine, hata kama hii
kazi mstari moja tu ya kificho, ni

26
00:01:24,570 --> 00:01:27,290
haina sasa na baadhi ya juu
ngazi lengo magazeti

27
00:01:27,290 --> 00:01:28,950
jina la mtu kwa salamu.

28
00:01:28,950 --> 00:01:33,115
>> Sasa ndani ya kuu, taarifa kwamba mimi nina
wito jina magazeti kwa kupita s.

29
00:01:33,115 --> 00:01:35,830
Na hivyo mimi kuonekana sasa kuwa na
mpango kamili.

30
00:01:35,830 --> 00:01:38,650
tofauti tu kuwa kutoka kwa watu wengine
tumekuwa imeandikwa ni kwamba sio tu anafanya

31
00:01:38,650 --> 00:01:42,480
mpango huu kuwa kuu, pia ina
tamko na utekelezaji wa

32
00:01:42,480 --> 00:01:44,740
magazeti jina, kazi yangu mwenyewe.

33
00:01:44,740 --> 00:01:49,505
>> Hebu sasa mpango wa kukusanya yangu na kufanya
kazi sifuri, na kuendesha kwa dot

34
00:01:49,505 --> 00:01:51,080
kufyeka kazi sifuri.

35
00:01:51,080 --> 00:01:53,390
Wakati ilisababisha kwa jina langu
Mimi itabidi aina katika Daudi.

36
00:01:53,390 --> 00:01:55,830
Na mimi kweli ni akamsalimu
na "Hello, Daudi."

37
00:01:55,830 --> 00:02:00,160
>> Sasa, ni zamu nje mimi sana kwa makusudi
alitangaza magazeti jina juu kuu,

38
00:02:00,160 --> 00:02:03,860
hivyo kuwaambia C mapema kwamba kuna
ipo kazi kuitwa magazeti

39
00:02:03,860 --> 00:02:06,930
jina ili niweze kutumia
baadaye katika kuu.

40
00:02:06,930 --> 00:02:11,610
Sasa, alikuwa mimi badala yake kuweka jina magazeti katika
chini ya faili yangu, kama kusema ukweli mimi

41
00:02:11,610 --> 00:02:15,310
pengine ni lazima kufanya hivyo kwamba mabaki kuu
Jambo la kwanza kwamba mimi au

42
00:02:15,310 --> 00:02:18,450
mtumiaji mwingine anaona katika kanuni yangu,
zinageuka kuwa code yangu ni

43
00:02:18,450 --> 00:02:19,780
si kwenda kukusanya.

44
00:02:19,780 --> 00:02:23,610
>> Hasa, kama mimi kwenda nyuma yangu
terminal dirisha na kukimbia kufanya kazi

45
00:02:23,610 --> 00:02:26,120
zero sasa, taarifa kwamba mimi nina yelled saa.

46
00:02:26,120 --> 00:02:30,340
Kama mimi kitabu juu katika terminal dirisha yangu,
Mimi utaona kosa hili kwanza katika nyekundu,

47
00:02:30,340 --> 00:02:33,120
thabiti tamko la
kazi magazeti jina.

48
00:02:33,120 --> 00:02:34,220
>> Sasa, je, hiyo ina maana gani?

49
00:02:34,220 --> 00:02:37,190
Naam, ingawa nimekuwa kutekelezwa
magazeti jina katika faili hii, nimekuwa si

50
00:02:37,190 --> 00:02:40,080
kutekelezwa ni kabla ya mimi wameweza
kutumika katika kuu.

51
00:02:40,080 --> 00:02:43,160
Sasa, tunaweza kurudi nyuma na umri
toleo na kuweka jina magazeti ya

52
00:02:43,160 --> 00:02:44,450
utekelezaji juu juu.

53
00:02:44,450 --> 00:02:48,730
>> Lakini siwezi badala tu kutoa C ladha
kwamba kuna kazi ijayo.

54
00:02:48,730 --> 00:02:55,390
Hasa, juu kuu naweza kutangaza
magazeti jina tu kama mimi hapo awali, lakini

55
00:02:55,390 --> 00:02:59,450
mwisho line na semicolon, na hivyo
na kuahidi kutekeleza lakini bado

56
00:02:59,450 --> 00:03:02,180
kweli utekelezaji wa kazi
kuitwa jina magazeti.

57
00:03:02,180 --> 00:03:05,860
Naweza kisha na kuu juu ya yangu
faili kama mimi na matumaini, na kweli mimi

58
00:03:05,860 --> 00:03:07,440
kutekeleza jina magazeti chini.

59
00:03:07,440 --> 00:03:12,860
>> Kama mimi sasa kurudi terminal dirisha yangu
na recompile kazi zero na kufanya,

60
00:03:12,860 --> 00:03:14,390
wakati huu inaandaa.

61
00:03:14,390 --> 00:03:18,240
Na kama mimi kuendesha kwa dot slash kazi
zero kutoa jina langu, mimi nina

62
00:03:18,240 --> 00:03:20,650
akamsalimu kama "Hello, Daudi."

63
00:03:20,650 --> 00:03:22,268