"

1
????? ?????? ????? ??? ???"?
????? ???
www.cs.tau.ac.il/armon/mehina.html
2
?????? - ????? ????? ??????

• ???? ?????
• ????? ???/???, ??????, ????.
• ???? ????? ?????
• ??? ?????, ??????, ???? ??????, ?????????.
• ???? ???? C
• ??? ?????, ???? ????? ?? ??????, ???????.

3
?????? ?????? ?????? ???? C

• include ltstdio.hgt
• int main()
• printf(Hello World\n)
• return 0

4
?????? ????? ???? ?????? ?????

• include ltstdio.hgt
• int main()
• int seconds, hours, minutes
• hours 24
• minutes 60
• seconds hours minutes 60
• printf(Number of seconds is d\n, seconds)
• return 0

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

• ??? ?? ????? ????? ???????
• ????? ??????? ??????
• ????? ?????
• ???? ?????? ?- C
• ???/??? ?? ??????
• ?????? ?? ??????

6
??? ?? ????? ????? ???????

• ????? ??? ????? ??????? ?? ????? ???? ???????
  ????, ???? ??????? ???? ?? ?????? ????????
  (?????, ???????, ????-????).
• ?????? ??? ?? ???? ???? ???? ?? ??????, ??? ?????
  ???????.
• ?? ????? ???? ????? ????? (file) ??????, ???????
  ?? ??.

7
??? ?? ????? ????? ???????

• ??? ???? ?? ?????, ??????? ?? ??? ????? (??????
  ?? ??? ?? ?? ?????? ???????).
• ??????? ????? ?? ????? ex1.c, main.exe,
  article.doc, prog.obj, ex1.cpp.
• ???? ??????? ????? ???? ????? ???? ?? ???? ?????
  ????? ???? ??? ??????.

8
??? ?? ????? ????? ???????

• ?????? ?????? ??????
• c ???? ????? ?????? C.
• exe ?? com ???? ????? ????? ("???? ????").
• obj ???? ????? ????-?????.
• doc ???? WORD.
• html ?? htm ?? ???????.
• xls ???? Excel.
• ppt ???? Powerpoint.
• txt ???? ???? ?? notepad.

9
??? ?? ????? ????? ???????

• ????? ????? ?? ?????? ??????? ( ?????? ???????
  folders ?? directories) ???-??????.
• ?? ???? "??" ?? "???????" ?? ??????.
• ?????? ?? ????? (?- path ???) ???? ?? ??????? ???
  ?????? ????? ??? ????? ????, ????
• C\WINDOWS\TEMP\BACKUP.DOC

????
10
??? ?? ????? ????? ???????

• ??????? ???? ???? ?????? ???? ??????
  C\WINDOWS\DESKTOP
• ???? ????? ??? ?????? ?????? ?? ????? ?? ????? ??
  ??????.
• ???? ????? ?????? ????? ?????? file (??????? new)

11
??? ?? ????? ????? ???????

• ???? ????? ???? ?? ????? ??????? ?????? ????? ??
  ?????? ????? ?? ????? ?????? ?- rename.
• ???? ????? ????? ????? ??????? find ?????? start.

12
??? ?? ????? ????? ???????

• ????? ??- path ??? ?????? ????? ?? ?????
  ????????, ??? ????? ????? ?? ????? ??????? ??????
  ????? ??????? ??????? ????? ?? ??? ???? (???
  ????? ?????? ????).
• ?? ?? ????? ????? ?? ?????, ?????? ???? ??????
  ????? ?? ???? ?????? (??? ???? ????? ???? ??? ???
  ????? ???????).

13
??? ?? ????? ????? ???????

• ???? ?? ??????? ??????? ??????? ???? ????????
  ?????? ?? ?????? ????
• armon_at_post.tau.ac.il
• www.cs.tau.ac.il/armon/mehina.html

?? ?????? ???? ????? ????-???????? ?? ???? ??
???? ??????? ????? ????, ???? ?-
www.mail.yahoo.com
14
??? ?? ????? ????? ???????

• ????? ???????
• ??????
• path
• find
• ??????

15
????? ??????? ??????

• ??? ?????
• ????? ?????? ????? ????? ?????
• ???? ?????? ???? C
• ????? ?????? ?? ???? ?????? (???/???)
• ?????? ????? ???? ?? ??????

16
??????? ?????? ????

• include ltstdio.hgt
• int main()
• int seconds, hours, minutes
• hours 24
• minutes 60
• seconds hours minutes 60
• printf(Number of seconds is d\n, seconds)
• return 0

17
????? ??????? ??????

• ???????? ???? ???? ????? ???? ??????? ?????
  ??????.
• ?????? ??????? ???? ??????? ???? ??????? ??
  ??????? ?????? ???????, ?????? ???? ?????? ?????
  ???? ????? ???????.
• ????? ?? ???? ?????? ??????? ???? ???? ???????,
  ???? ??? ??, ?? ????? ??????? ????? ?????.
• ????? ?? ????? ?? ??? ????? ?????? (???? ??'
  ???/??' ????/???) ?? ??? ??? ???? ??? ?????? ????.

18
??? ??????

• ???? ??????? ????? ??, ????? ????? ?? ????? ????
  ?????? (??????/?????/??????) ?????? ???? ?? ????
  ??????? ??.
• ??? ?????? ??????, ???? ????? ????, ????? ?????
  ?? ??? ??? ??? ?????? ???? ?????.
• - ?????? ?? ?????? ?????? ??????? ???????.

19
??????? ?????? ????

• include ltstdio.hgt
• int main()
• int seconds, hours, minutes
• hours 24
• minutes 60
• seconds hours minutes 60
• printf(Number of seconds is d\n, seconds)
• return 0

????? ???? ??????? ?????
???? ????? ??????? ??????? ?????
20
????? ??????

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

21
??????? ?????? ????

• include ltstdio.hgt
• int main()
• int seconds, hours, minutes
• hours 24
• minutes 60
• seconds hours minutes 60
• printf(Number of seconds is d\n, seconds)
• return 0

????? ???? ??????? ?????
???? ????? ??????? ??????? ?????
22
?????? ?????? ????? - ??????
seconds
minutes
hours
????? ??????? ???? ????? ???????
23
?? ??? ?????? ??????

• include ltstdio.hgt
• int main()
• int seconds, hours24, minutes60
• seconds hours minutes 60
• printf(Number of seconds is d\n, seconds)
• return 0

24
?????? ?????? ????? - ??????
seconds
minutes
hours
24
60
????? ??????? ???? ????? ??????? ?? ??? ??????
25
????? ?????? ??????? ???????

• int ???? ??? (????? ?????? ??? ??? 231- ????
  231).
• float ???? ???? (????? ??? ???? ?? 1038 , ????
  ??? ??? ????? ????? ??? ???? 38-10). ???? ?? 6
  ?????.
• double - ???? ???? (????? ????? ???? ???????).
  ????? ??? ???? ?? 10308. ???? ??? ??? ?????
  ????? ??? ???? 308-10. ???? ?? 15 ?????.
• char ?? ???? (???? a).
• - ????? ?????? ??????? ??? ???? ??????
  ???????????.

26
??????? ??????? ??????

• char c
• int i
• float the_max_percent
• double average
• ????? ?? ???? ??? ??????
• char cA
• int sum0

??? A' ????? ?????? ??? c
27
????? ?????? ???? ??????

• ?? ????? ???? ????? ?????? ???????, ?????, ???
  ?????.
• ??? ?????? ??? ?? ???? ????? ?????.
• ?? ???? ??? ??? ????? ???? ???? (case-sensitive).
  ????? a ?- A ?? ???? ?????.
• Counter, new_sum, total1.
• percent , 2counter, new-sum.
• ???? ???? ???? ??? ??????? ???? ???? ??????.

????
????
28
??? ?? ??? ??? ?????? ???????

• ??????? ??????? ?????? ???? ???? ??????? ??????,
  ???? ??? ????? ????.
• ????? ???? ???? ??????? ?????? ?????. ???? ?????
  ?????? ?????? ????? ?????? ???? ???? (?????? ???
  ????? ????? ??? ???? ???? ??????).
• ???? ??? ?????????? ???? ?????? ???????.
• - ????? ??????? ??????? ???? ???? ?? ?????
  ?????? ??? ???? ?????? ?? ???? ?????? ?? ??????.
  ????????? ???? ???????? ?????? ?????? ???????
  ???? ????? ?????? ??????.

29
????? ??????

• ??????
• ???????
• ????
• ??????

30
??? (?????) ?? ???? ??????

• ????? ?? ???????? printf ??????? ????? ?? ???
  ?????? ????. ????
• printf(The sum
  is d, sum)
• ?????? d ????? ???? ????? ???? ?? ?????, ??????
  ???? ?????? ????? ??????? (d ????? ?-int).
• ?? ?????? ?????? ??? ????? ???? ???????, ?????
  ?????.
• ??? ??? ????? ?? ????? ????? ???, ?????? ???? ???.

31
?????? ????? ??????

• d int (????? 10 ?????)
• char - c
• float, double - f (???? ?? ????? ??????? 21.54)
• g (??? ????? ????
  ?????)
• ??? ?????? ?? ????? , ????? printf()

32
??? ?? ??? ?????? ??????

• include ltstdio.hgt
• int main()
•    double a,b,c   a 2.51   b 2   c
  ab   printf("The product is g\n", c)  
  return 0
• ???? 5.02 The product is

33
????? ??? ?????? ????? ?????

• include ltstdio.hgt
• int main()
•    double a,b,c   a 2.51   b 2   c
  ab   printf(g g g\n", a,b,c)  
  return 0
• ???? 5.022.51 2

34
?????? ?????? ?????? ??????

• include ltstdio.hgt
• int main()
•    double a,b   a 2.51   b 2  
  printf(g g g\n", a,b,ab)   return 0
• ???? 5.022.51 2

35
char ????? ?? ??????

• ?? char (??) ???? ??????? ????? ?????.
• ?? ????????? ???? ?? 256 ????? ??????? (????
  ASCII). ??? ????? ??, ??? ???? ??????? ?? ?????
  ??????? ?? ??? ??? ?????.
• ?? ?? ???? ??? ("???") ????.
• ???? ??????? A-Z ?????? ??? ???? ??????? 65-90,
• ??????? a-z ??? ???? ??????? 97-122, ???????
  ??? ???? ??????? 48-57 ?????.
• char cA ?????? ?"? ????????? ?- char c65

36
????? ??????? - ?????
????? ?????? ???? ?? ?????? ??? ?? ?????

• includeltstdio.hgt
• int main()
• char i A'
• printf(i as a character is c\n", i)
• printf("i as an integer is d\n", i)
• return 0

?? ??? char i65
i as a character is A
i as a number is 65
37
char ????? ?? ??????

• ????? ??????? ?? ????? ??????, ???? ?? ?????
  ????? ?????? ?????.
• ???? a1 ?? b.
• 81 ?? '9'.
• ????? ???? ???.

38
????? ??????? - ?????

• includeltstdio.hgt
• int main()
• char i A'
• printf(i as a character is c\n", i)
• printf("i as an integer is d\n", i)
• printf("The character after c is c\n", i,
  i1)
• return 0

?? ??? char i65
i as a character is A
i as a number is 65
The character after A is B
39
????? ??????? - ??? ???????

• i as a character is A
• i as an integer is 65
• The character after A is B

40
??? ?? ??????

• ?????? ???
• ????? ???????
• ??????

41
??? ?? ???? ??????

• ??"? ????? ???????? ????? ?? ??? ?????? ??????.
• ????? ???????? printf, ????? ???????? scanf
  ?????? ??? ??????? ???? ?????. ???? ??? ?? ???
  ?????
• scanf(d g,
  student_num, average)
• ????? ????? ????, ?????? ???? ?????? ??????.
• ?????? ???? ???? ??????? ?????? ?- printf, ????
  ?? ??- double ???? ????? lf

42
????? ???? ?? ?????? ?????

• include ltstdio.hgt
• int main()
• int a, b, sum
• printf(Enter an integer\n)
• scanf(d, a)
• printf(Enter an integer\n)
• scanf(d, b)
• sum a b
• printf(Answer d d d\n, a, b, sum)
• return 0

43
???? ???????

• Enter an integer
• 5
• Enter an integer
• 7
• Answer 5 7 12

44
????? ???? - ????? ???????
a
b
sum
????? ??????? ???? ????? ???????
45
????? ???? ????? ???????
a
b
sum
5
????? ??????? ???? scanf(d, a)
46
????? ???? ????? ???????
a
b
sum
5
7
????? ??????? ???? scanf(d, b)
47
????? ???? ????? ???????
a
b
sum
5
7
12
????? ??????? ???? sum a b
48
???/??? ?? ??????

• ????? ???????

49
?????? ?????? ?? ??????

• ?????? ?? "????????? ?????????"
• ??????? ()
• ????
• ?????
• ?????
• ???
• ????? /
• ?????? (?????)
• ?????? ?? ?????? ?????? ?? ?????? ?????.
• ???? 1 72 2 83.
• ??? ??????? ??? ??? ?????? ????????.

50
????? ????? ???????? ???????

• include ltstdio.hgt
• int main()
• double cels, fahr
• printf("Please enter a fahrenheit
  temperature\n")
• scanf("lf",fahr)
• cels 5(fahr-32)/9
• printf("This is equal to g degrees celsius\n",
  cels)
• return 0

????? ???????
????? ??? ??????
????? ??????
51
?????? ?????? ??????-??

• ?????? ?????? ????? ????? ???? ??? ??????
• 37/2
• ?? ????? ????? ?? ?????? ?????? ?????, ????? ????
  ?? ???? ???? ??? ?? ????/???? ???? ???? ???????.
  ???? 3.57/2.0
• ?? ????? ?????? ??? ???? ?????? ???????? ???,
  ???? ????? ????? (overflow). ??? ???????? ??
  ?????? ?????? ?????? ?? ?????? ?- double.

52

• ?????

• ?????
• ????? ??????
• ?????? ?????? ??????? ???? C
• ??? ???? ?? ??????
• ????? ?????? ?? ??????

53
????? ???????

• ????? ?????? ????? ???

54
1) ????? ?????? ?????? ???? ???? ?????????? ?????
????????, ??????? ???? ?? ????? ??????.

• ????? ?????? ?????? ????

55
????? ????? ??????-????? ??????

• include ltstdio.hgt
• int main()
• double weight, price, total
• printf(Enter the weight in kilos\n)
• scanf(lf, weight)
• printf(Enter the price for a kilo\n)
• scanf(lf, price)
• total weightprice
• printf(The total price is g\n, total)
• return 0

56
2) ????? ?????? ?????? ???? ???? ???, ??????
1 ?? ??? ????, ??????? 0 ?? ??? ??-????.

• ????? ?????? ?????? ????

57
????? ????? ?????? ????? ????

• include ltstdio.hgt
• int main()
• int a
• printf(Enter an integer for checking
  parity\n)
• scanf(d, a)
• printf(If it is even, 1 will be printed
  otherwise 0 \n)
• printf(d\n, 1 - (a2) )
• return 0