帮帮忙，谢谢大侠，VB

llm3-1415926

<>rivate Sub cmdPlot_Click()
, I5 A$ k% m" ^) }$ ~# k0 RXY
8 |" _, P. G$ {1 ]! C$ _% qOn Error Resume Next
Dim x As Double, Y As Double
Randomize
( b" q$ X& [4 T5 W  
        SC.Reset
% C- q+ b# p# u5 r) j; G        SC.AddCode "Function RunThis(X)" &amp; vbCrLf &amp; "RunThis=" &amp; txtEquation &amp; vbCrLf &amp; "End Function"
! B# O; O/ |4 X: B. R       For x = -15 To 15 Step 0.001
1 v* `; u, V( _5 U- o; S         Y = SC.Run("runthis", x)
         DoEvents
' v* a* }6 o' B) g0 t, u          Picture1.PSet (x, Y), RGB(250, 0, 0)
          Next x
" Z2 d$ ~( ^0 r3 }$ s5 ~End Sub</P>
<>为仕么Y=LOG（X），SQR（X）也有图象（X轴负半轴），请帮忙</P>

USER001

把完整代码发上来

llm3-1415926

<><b>帮帮忙，跪下谢谢斑竹，VB</b></P><>rivate Function PrintWord(x, Y, Word As String)
With Picture1
& c* p" N5 R: y9 c* I.CurrentX = x
.CurrentY = Y
.ForeColor = RGB(0, 0, 255)
End With
4 o/ W& \( W; T  d. T3 ~Picture1.Print Word
4 p( `% b8 `8 }! m. XEnd Function
* C% U& P  M. c+ }$ U5 ^'定义画点函数
0 |$ }5 d5 k9 ?" L+ }& _Private Function DrawDot(Px, Py, Color)
Picture1.PSet (Px, Py), Color
% y% B9 f% D4 H- S- p2 @2 m9 wEnd Function
Sub XY() '建立直角坐标系
Picture1.DrawWidth = 1 '设置线条宽度
Picture1.Cls
7 h( W! {! O# y+ H" O5 O* Q'设定用户坐标系，坐标原点在Picture1中心
Picture1.Scale (-10, 10)-(10, -10)
6 {( l$ @" @3 \4 R9 ~Picture1.Line (-10, 0)-(10, 0), RGB(0, 0, 255)
Picture1.Line -(9.5, 0.5), RGB(0, 0, 255)
Picture1.Line (10, 0)-(9.5, -0.5), RGB(0, 0, 255)
8 f5 g5 V+ l" B, T3 iPicture1.ForeColor = RGB(0, 0, 255)
5 }  i4 b/ ]" v( d# APicture1.Print "X"
'画 X 轴
* z  v" X' Y: ^8 z% vPicture1.Line (0, -10)-(0, 10), RGB(0, 0, 255)
% N5 K3 c: w$ \0 mPicture1.Line -(0.5, 9.5), RGB(0, 0, 255)
: J* n" r+ f( APicture1.Line (0, 10)-(-0.5, 9.5), RGB(0, 0, 255)
Picture1.Print "Y"
'画 Y 轴
For lin = -9 To 9
Picture1.Line (lin, 0)-(lin, 0.25)
% k+ F, R0 x* o& \/ W! Q, J: ywor = PrintWord(lin - 0.5, -0.5, Str(lin))
  l1 e: U) \# ?1 X8 z) V( u/ W  `Picture1.Line (0, lin)-(-0.25, lin)
* t( r3 ^' p: f  v, nIf lin &lt;&gt; 0 Then
' B, L) c. l0 h6 g$ Qwor = PrintWord(-0.9, lin, Str(lin))
End If
5 N1 V/ z) y/ h$ ]) |$ C/ jNext lin
- c  ~. o. m  R8 wPicture1.DrawWidth = 1
End Sub
Private Sub cmdPlot_Click()
XY
On Error Resume Next
Dim x As Double, Y As Double
Randomize
  
        SC.Reset
/ U! m7 m6 r, A1 |; N5 a        SC.AddCode "Function RunThis(X)" &amp; vbCrLf &amp; "RunThis=" &amp; txtEquation &amp; vbCrLf &amp; "End Function"
       For x = -15 To 15 Step 0.001
         Y = SC.Run("runthis", x)
5 b6 p3 k( ~3 V, [2 A5 k/ x         DoEvents
          Picture1.PSet (x, Y), RGB(250, 0, 0)
* l8 ^9 j% `( a5 I2 a          Next x
, y2 Q# E9 I2 P8 K/ X8 E- ]+ \4 DEnd Sub</P><>rivate Sub Command2_Click()
XY
End Sub</P><>rivate Sub Command3_Click()
End
End Sub</P><>
Private Sub Form_Load()
Me.Caption = "美丽曲线——山东省商河一中路来民"
Me.Show
Me.AutoRedraw = True
XY
End Sub
7 S& i& Q8 O4 a4 `控件</P><>为仕么Y=LOG（X），SQR（X）也有图象（X轴负半轴）， SC为MS.SCRIPT.control请帮忙,谢谢斑竹,跪谢！！！</P>

秋天的风儿

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