Special Operators ?????????????????

1
Special Operators?????????????????

• Increment and decrement operators
• Conditional Operator

2
Conditional operators

• ??????
• expr1 ? expr2 expr3
• ????????
• ????????
• scanf(01, i) ? printf(Valid input)
  printf(Invalid input)

????
????
???????????? expr1
???????????
expr2
expr3
3
????????

• ???????????????????? ?????????????????????????????
  ????? 3 ?????
• ?????????
• ??????????????? (max)
• ???????????? 3 ????? (a, b, c)
• ?????????
• ????????????????????????????
• ??????

???????
????????????
??????????
4
???????? (???)
include ltstdio.hgt void main( ) int a, b,
c, max printf(Enter integer \na
) scanf(d, a) printf(b
) scanf(d, b) printf(c
) scanf(d, c) max (agtb) ? a b
(max lt c) ? maxc printf(The maximum is
d, max)
5
???????? (???)
????
????
a gt b
????
????
????
????
a gt c
b gt c
max c
max a
max b
max c
max (agtb) ? (agt c ? a c) (bgt c ? b c)
6
Increment decrement operators

• ???????????????????????????? Integral types
  ????????
• ?????????????????????????????????? 1 ?????
• (Increment) ????????????????????? 1 ?????
• ? n n 1 ? n 1 ? n ? n
• -- (Decrement) ???????????????? 1 ?????
• ? n n - 1 ? n - 1 ? n-- ? --n
• Postfix operator ?????????????????????????????????
  ???????
• Prefix operator ??????????????????????????????????
  ??????

7
????????
/ Demonstrate prefix and postfix increment
operator / include ltstdio.hgt void main()
int x , post 1, pre 1 x post
printf(x d\tpost d\n, x, post) x
pre printf (x d\tpre d\n, x,
pre) ????????????? run ????????????? x
1 post 2 x 2 pre 2
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?????????????????????????????
( ) (postfix) --(postix) ????????? (unary)
-(unary) ! sizeof() (prefix) --(prefix)
????????? / ????????? -
????????? lt lt gt gt ?????????
! ????????? ?????????
????????? - /
?????????
????????????
??????????????
9
Arithmetic operators
??????????????????????????????????
int a1, b2, c3, d 4
?????? ???????????????
????????????
a b c-- 7 - -b d
((a) b) (c--) 1 7 ((-b)
(d)) 15
10
????????
int digits,
number for(digits 0 number gt 0 digits
1) number / 10 for
(digits0 numbergt0 number / 10,
digits) for (digits0 numbergt0 digits)
number / 10 for (digits0 numbergt0 number /
10, digits)
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???????????????????????????????

• int i, n
• for (i8, n50 n ! 1 i)
• n (n 2 0) ? n / 2 3 n 1
• if (i 6 0)
• printf(\n)
• printf(d , n)
• printf(No. of hailstones generated d\n, i)