????? 1 ??????????? (Introduction to C Programming Language)

1
??????????????????????????????????
2
????????????

• ??????
• scanf ( ?????? , ????????????1,
  ??????????2,..)
• ??????????????????????????????????????
• ?????????????????????????????
  ?????????????????????
• ????????????????????? ?????? (Format code)
  ?????????
• ?????????????????????????????????????

3

• ?????????? (formal code)
• d ???????????????????? integer
• ld ???????????????????? long
• c ???????????????????????
• s ??????????????????????? (string)
• f ???????????????????????????????

4
?????? (Format code)????????????

• ?????? ?????????????????
• d, i ????????????????????????????????
  int
• ld ???????????????????????????????? long
• u ???????????????????????????????????????
  unsigned
• O ??????????????????????? 8
  ????????????????? unsigned
• x, X ??????????????????????? 16
  ???????????????? unsigned
• c ???????????????? 1 ???
• s ???????????????
• f ????????????????????????????? float
• lf ????????????????????????????? double

5
????????????????????????

• ????????????????? ??? Format code ??????
• ????
• d s ?????? ??????????????????????
  
• ?????????????????????????????????????????
• ???????????????????????????????????????

6

• ????
• ????????????????????????????????
• ?????????
• int month, year
• scanf (d d, month, year)

7

• ????????????????????
• scanf (d/d/d, day, month, year)
• ??????????????????????????
• 20/7/2001
• ?????????????????????????????? ????
• scanf(2d2d4d, day, month, year)
• ?????????????????????????????
• 20072001

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????????????????????????????????
printf

• printf (?????????)
• printf (??????,??????????1,??????????2,.. )
• ????
• Control?????????? ???????????????/??????(Fo
  rmat code) ?????????????????????
  ?????????????????????????????????
• ???????????????????????????????????????????????
  ????????

9
???????? printf
?????? printf (?????????) printf
(??????,??????????1,??????????2,.. )
???? printf ("One 1 two 2") printf ("One d two d", 1, 2)
10

• ?????????? (formal code)
• d ???????????????????? integer
• ld ???????????????????? long
• c ???????????????????????
• s ??????????????????????? (string)
• f ???????????????????????????????
• ????????
• printf(One d Two d,
  1,2)
• ???????????????
• One 1 Two 2

11
?????? (Format code)????????????

• ?????? ?????????????????
• d, i ????????????????????????????????
  int
• ld ???????????????????????????????? long
• u ???????????????????????????????????????
  unsigned
• O ??????????????????????? 8
  ????????????????? unsigned
• x, X ??????????????????????? 16
  ???????????????? unsigned
• c ???????????????? 1 ???
• s ???????????????
• f ????????????????????????????? float
• lf ????????????????????????????? double

12

• ????
• char name Mickey
• int age 20
• printf(s is d years old., name, age)

???????????????? Mickey is 20 years old.
13

• ?????????????????????? ? ???????????
• printf(Good morning.)

???????????????? Good morning.
14

• ???????? ?????????????????????????????????
• int x, y
• x 7
• y 2
• printf(The sum of d and d is d\n, x, y,
  xy)

???????????????? The sum of 7 and 2 is 9
_
15

• ???????? printf( ) ?????????????????????????
• ????????? ????????????????????????? ?????????????
• ????
• printf(The sum of 5d and 5d is 5d\n, a, b,
  ab)

????????????????????? The sum of 7 and 2
is 9 _
16
???????????????????????????????????

• ????????????? ????????????????????????????????
  ?????????? ???????????
• ??????????? ?????????????????????
• ????????? ???????????????????????
  ?????????????????????????????????
• ????????????????????????????????????????? ???
  Format code

17

• ????????
• float x43.34, y2.231
• printf(Minus f with f, answer is f, x, y,
  x-y)

????????????????????? Minus 43.340000 with
2.231000, answer is 41.109000
??????????? printf(Minus 4.2f with 4.2f,
answer is 4.2f)
????????????????????? Minus 43.34 with 2.23,
answer is 41.11_
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?????????????????????????????
??????????????????????????????????????????????????
???????????

• ???????? ????????????????????????????????????
• include ltstdio.hgt
• include ltconio.hgt
• void main( )
• clrscr( )

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Computer

• printf("\ns", "Computer")
• printf("\n2s", "Computer")
• printf("\n.3s", "Computer")
• printf("\n10s", "Computer")
• printf("\n-10s", "Computer")
• printf("\n-10.3s", "Computer")
• printf("\n")

Computer
Com
Computer
Computer
Com
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• printf("\nd", 100)
• printf("\n.2d", 100)
• printf("\n10d", 100)
• printf("\n-10d", 100)
• printf("\n-10.2d", 100)
• printf("\nf", 32.5762)
• printf("\n.2f", 32.5762)
• printf("\n10.2f", 32.5762)
• printf("\n-10.2f", 32.5762)

100
100
100
100
100
32.576200
32.58
32.58
32.58
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• ???????? ???????????????????????????
• include ltstdio.hgt
• void main( )
• char name100
• printf("What is your name ?\n")
• scanf("s", name)
• printf("Very glad to know you, ")
• printf("s.",name)

?????????????????? What is your name
? Willy Very glad to know you, Willy.
22
????????? getch()

• ????????? getch()  ???????????????????????????????
  ?????? 1 ??? ????????????????????
• include ltconio.hgt
• void main( )
• clrscr( )
• printf (Good morning )
• getch()

23
?????????

• ??????????????????? ??????? ??? ???????
  ???????(???????) ???????????????????
• ??????????????????? ??????????
• ?.?. ?????????? ½ ??? ???
• ??????????????????????? 5 ???????????????????
  ???????????????????