a(j - 1) = temp , ]4 C- I5 f8 n4 K7 L7 o9 k0 z
End If 1 L5 l) f% K, C( I/ \) R
Else
9 r1 q! B8 i {1 x5 |5 K# Y# X If a(j) > a(j - 1) Then
O, G7 @- q0 Y; v$ @* h8 k temp = a(j)
- h1 W; g2 H" _! X) Q a(j) = a(j - 1) - H6 I* P/ g3 o6 ^; o/ h! q1 }4 L- k
a(j - 1) = temp
! P5 s) U4 T: { End If
. q% h5 T' c" D- |( ]" c9 A o End If
o; s- I5 G1 r* E& n: }3 \ Next j '出了内循环,一轮排序结束
" s: @7 @+ g8 ^. V '最值元素冒到最上边 0 C) d: L9 @2 g. m* |
Next i 0 `+ f' z8 n$ r! U: a p
End Sub 6 z- N7 L" c. S; M O
调用该过程代码基本同上。2 B' i( ]. a" V! z
2、实战练习</p> 1) 补充代码# i4 m- z3 j6 d% q% P6 T1 Y0 S
下面是一个采用拉锯式排序法对数组元素按升序进行排序的程序,所谓“拉锯式排序法”是这一遍把最小的元素从下到上送到最上的位置,下一遍则是从上到下把最大的元素送到最下的位置。 i! W6 [- }. [2 j8 Y
以下是引用片段:
% {) Y$ q) n# W( j+ C+ I1 h: T& m Option Base 1
: k! U- w) l, O6 W# H" t# Z X& _ Private Sub Command1_Click() ) T% H3 y+ i4 r. f0 W
Dim a(10) As Integer,i As Integer
/ c4 |2 a; |$ U8 [8 B+ Y For i = 1 To 10
& l) x* s2 O# w. X0 ?# q+ a$ @+ l( b a(i) = Int(Rnd * 10)+1 0 P! |+ L# G6 I" }& D
Text1 = Text1 & Str(a(i))
* @/ |+ a8 I) W2 j" s7 y1 E Next i ( e9 A" E" Q+ V8 l
Call shaker_sort(a)
! h' d& \5 l& b For i = 1 To 10 . \% ?- o* U* i% M# e
Text2 = Text2 & Str(a(i)) 2 y) H5 r4 k J0 T( q
Next i
9 [/ U7 G1 r9 X) y, }8 \9 D; \ End Sub 2 m- w% S% l2 [# I* W# }
Private Sub Shaker_sort(k() As Integer)
* g9 T3 @/ |( J* s/ P Dim i As Integer,c As Integer,d As Integer ; y3 I4 ?) z) z: D6 Q: Y& d [
Dim t As Integer * E& E6 c3 ^. K0 K5 D- L( S1 m
c = 1
* r; D3 J2 U4 j+ X! J7 G d = (1)
( s3 ]* w, W3 T) d Do - C; T1 c. u& p6 N2 B) b, j8 h% [
For (2) Step-1
, s/ j, h. q$ m: X+ \ If k(i=1)>k(i) Then , P' s1 C1 [% A! M8 O/ g& A( G8 Q
t = k(i-1):k(i-1) = k(i):k(i) = t K$ t& r n: e$ r
End If ! K x7 S( t) X8 m# U( U
Next i ! g$ K+ \( P D5 D
(3)
$ v$ }0 r9 ?$ i; x' {3 a For i = c+1 To d 9 T$ O& F4 b* A, o
If (4) Then
8 c ~) n! p* W t = k(i-1):k(i-1) = k(i):k(i) = t
3 Z f' p8 }6 i) \: n/ {$ y1 J, L End If
& A2 I/ Y6 Y3 X. l/ k( e8 y1 Q! i Next i
8 o9 v$ y. |6 _! }. O& B d = d-1
$ Y9 B* p: y8 I8 }' U Loop While (5)
6 {$ k5 Q: U ~/ N9 I End Sub
3 O; x6 Q: U5 F6 p) i6 j" C" d) K" M) u2 q6 [; N
2) 编程题
6 O+ |6 y, \9 \: z; s- F0 q 把文本框输入的字符串按降序添加到列表框中。 |