</p>
; h' ]$ Z! R& M, z" r( |' [/ ~! t( i4 A) k; |# a
解题技巧
9 m5 B( l( d" V, m 进制转化的原理要清楚,同时编写代码时候要留意16进制中的A-F字符的处理。
" _' m/ R4 G5 X$ e# C 2、实战练习 7 g( v* N. x* p, M9 q
1) 补充代码(2002秋二(9))
+ z9 l: \, h; ?3 L& C 本程序是把给定的二进制整数转换为八进制整数。
: ?, _: u4 K% [/ ~3 N7 o; b3 V Private Sub Command1_Click()
8 M+ |# F# z6 H; d0 ~: g Dim a As String, b As String, c As String
' j5 G- A# e$ x3 R# Y# A1 c Dim L As Integer, m As Integer, n As Integer 6 D& p8 @$ n5 l4 l- o" v# {
a = InputBox("请输入一个二进制数", "输入框") 2 _5 Q' e+ Q9 o, ^ Q$ }
(1) $ M# \$ Z' [( X( D) ^) ?8 q
a = String(L, "0") & a
/ v5 T1 {' C* J/ m b$ N' d (2)
$ x% [+ w$ Z, Q2 A# t For m = 1 To n / 3 , p! x9 x" R$ s9 L; r" W, k
b = Mid(a, 3 * m - 2, 3) - n' A4 x# k' h. p- E! ]4 q
(3)
, O; K' @4 \ O: Q Next m 9 @: F- F' }/ J7 J+ ~
Text1.Text = c
! k1 K, ~: I! P: W5 H8 e. [6 Q End Sub Private Function zh(s As String) As String
4 ^: J& t6 O* C) j$ t: p Dim i As Integer, n As Integer, p As Integer : B7 e- A1 p0 E! U
p = 1 . h3 q ^! G9 l% \* K7 K; K, w
For i = 2 To 0 Step -1
6 @) b0 j J$ _ (4) + c5 j/ S6 d) W( ^' G
p = p + 1
4 Y8 F, P: p1 L( Q3 \3 u" l Next i ; R7 g5 n' c# ^3 N _
zh = Str(n)
3 R5 K8 @/ M6 { End Function 4 s) U4 j+ c6 h/ M8 y4 h0 W
2) 补充代码(2001春二(7))
8 u0 I. D j" `0 M6 i 下面程序是把给定的16进制正整数转换为10进制数。 - D2 U8 N" a6 ?: |. T& g$ T5 k
Option Explicit ^6 p( G6 |7 B2 Y; ~' g9 R% R+ O* \
z! p ^5 V# f* { N, w; p' n
Private Sub Form_Click() ; i" l) i8 [3 J$ Y7 f4 t
Dim St As Integer, Dem As Long 7 N& _" J; a o
St=InputBox("输入一个十六进制数") - B5 K# C3 i/ f- X; s( z4 s! m
Dem=Convert(St)
6 R8 g6 g* L$ a0 U2 E. l$ w+ x% K: I Print St; ">="; Dem
% m) [! a! }( T( u, E( C, J4 ]% @ End Sub Private Function Convert(S As String)As Long 6 E5 D) ^+ n9 Q
Dim N As Integer, I As Integer,Substring As String*1 6 s; u4 S* y* p$ X
Dim P As long, K As Long,Asc1 As Integer : V+ F; a) {/ ^
N= (1) ! n8 b o- @: D% U7 ^6 W8 I' m
P=16^N
) C8 U x" _; P3 O' N For I=1 To N
9 }) t( h, u* E7 o: ~ P=P/16 - \. [- z! s- F+ z
Substring= (2) ) ~$ O3 G3 L8 F0 j
Select Case Substring , o" @6 z/ C$ [( [; X' @, @
Case "0" To "9"
+ m5 w- u# p) C, U7 x K=K+P*Val(Substring)
0 |* O; {0 T7 h, ?2 G# g. F) F Case (3) 6 `. s7 y/ H: M! A) J" p
Asc1=Asc(Substring)-Asc("A")+10 ; F) a' T) [+ L, N& \
(4) ; V" x" l1 G4 ~$ U# R! ^
End Select ; E+ m# R3 l5 k K5 d
Next I
- f% |% [ T' D/ Y. X (5) |