方法1.frm

解各类线性方程的方法以及相关的编程! 希望可以采用我这个工程软件,我可是花了好多的心血!

VERSION 5.00
Object = "{F9043C88-F6F2-101A-A3C9-08002B2F49FB}#1.2#0"; "COMDLG32.OCX"
Object = "{5E9E78A0-531B-11CF-91F6-C2863C385E30}#1.0#0"; "MSFLXGRD.OCX"
Begin VB.Form 方法1 
   Caption         =   "高斯列主元消去法"
   ClientHeight    =   7620
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   10470
   LinkTopic       =   "Form4"
   Picture         =   "方法1.frx":0000
   ScaleHeight     =   7620
   ScaleWidth      =   10470
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command4 
      BackColor       =   &H0080FF80&
      Caption         =   "返回主窗口"
      Height          =   735
      Left            =   8760
      Picture         =   "方法1.frx":25CFB
      Style           =   1  'Graphical
      TabIndex        =   7
      Top             =   6840
      Width           =   1575
   End
   Begin MSComDlg.CommonDialog CommonDialog1 
      Left            =   1440
      Top             =   6000
      _ExtentX        =   847
      _ExtentY        =   847
      _Version        =   393216
   End
   Begin VB.Timer Timer1 
      Interval        =   20
      Left            =   600
      Top             =   6000
   End
   Begin VB.TextBox Text1 
      BackColor       =   &H8000000D&
      BorderStyle     =   0  'None
      ForeColor       =   &H80000009&
      Height          =   2895
      Left            =   7320
      MultiLine       =   -1  'True
      ScrollBars      =   3  'Both
      TabIndex        =   4
      Top             =   1080
      Width           =   2775
   End
   Begin VB.CommandButton Command2 
      BackColor       =   &H000080FF&
      Caption         =   "解方程组"
      Height          =   735
      Left            =   2040
      Style           =   1  'Graphical
      TabIndex        =   2
      Top             =   3840
      Width           =   1335
   End
   Begin VB.CommandButton Command1 
      BackColor       =   &H0080FF80&
      Caption         =   "打开方程组"
      Height          =   735
      Left            =   240
      Style           =   1  'Graphical
      TabIndex        =   1
      Top             =   3840
      Width           =   1215
   End
   Begin VB.CommandButton command3 
      BackColor       =   &H00FFFF00&
      Caption         =   "清除文本输出内容"
      Height          =   735
      Left            =   3960
      Style           =   1  'Graphical
      TabIndex        =   0
      Top             =   3840
      Width           =   1335
   End
   Begin MSFlexGridLib.MSFlexGrid MSFlexGrid1 
      Height          =   3615
      Left            =   120
      TabIndex        =   3
      Top             =   120
      Width           =   6495
      _ExtentX        =   11456
      _ExtentY        =   6376
      _Version        =   393216
      Rows            =   15
      Cols            =   15
      FormatString    =   "^ 序列|^  x1|^  x2|^  x3|^  x4|^  x5|^  x6|^  x7|^  x8|^  x9|^  x10|^     b"
   End
   Begin VB.Label Label1 
      AutoSize        =   -1  'True
      BackColor       =   &H8000000D&
      BackStyle       =   0  'Transparent
      Caption         =   "解线性方程组"
      BeginProperty Font 
         Name            =   "隶书"
         Size            =   36
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   -1  'True
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H000000FF&
      Height          =   720
      Left            =   360
      TabIndex        =   6
      Top             =   4800
      Width           =   4530
   End
   Begin VB.Label Label2 
      AutoSize        =   -1  'True
      BackStyle       =   0  'Transparent
      Caption         =   "输出结果"
      BeginProperty Font 
         Name            =   "隶书"
         Size            =   21.75
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H000000FF&
      Height          =   435
      Left            =   7680
      TabIndex        =   5
      Top             =   360
      Width           =   1860
   End
End
Attribute VB_Name = "方法1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
Dim A(20, 20) As Single, B() As Single, X() As Single
Dim i As Integer, N As Integer, j As Integer

Private Sub Command1_Click()
Dim FileName As String
Dim Astr As String
On Error GoTo errhandle
CommonDialog1.InitDir = App.Path '设置初始路径   数据导入
CommonDialog1.FileName = "" '清除文件名
CommonDialog1.ShowOpen '显示“打开”对话框
FileName = CommonDialog1.FileName '保存文件名
If Len(CommonDialog1.FileName) > 0 Then
    'File = FreeFile() '获得可用文件号
    Open FileName For Input As #1 '打开文件
End If
i = 0: N = 0: j = 0: Dim Line1 As String
MousePointer = 11
Do While EOF(1) = False
    N = N + 1
    Line Input #1, Line1
Loop
ReDim B(N): ReDim X(N)

MSFlexGrid1.Cols = N + 2: MSFlexGrid1.Rows = N + 1
Close #1
Dim Forstr As String
Forstr = "序列"
For i = 1 To N
   Forstr = Forstr & "|^  x" & i
   MSFlexGrid1.TextMatrix(i, 0) = i
Next i
Forstr = Forstr & "|^   b"
MSFlexGrid1.FormatString = Forstr


Open FileName For Input As #2 '打开文件
Do While EOF(2) = False
     j = j + 1
     For i = 1 To N
        Input #2, Astr ' 分别输入各数据
        A(j, i) = Astr
        MSFlexGrid1.TextMatrix(j, i) = Astr
     Next i
     Input #2, Astr
     B(j) = Astr
     MSFlexGrid1.TextMatrix(j, N + 1) = Astr
Loop
Close #2

errhandle:
    MousePointer = 0
Exit Sub
MousePointer = 0

End Sub


Private Sub Command2_Click()
Call JieFangCheng(A, B, X)
For i = 1 To N
   Text1.Text = Text1.Text & "  x" & i & "=" & X(i) & vbCrLf
Next i
End Sub



Private Sub Command3_Click()
Text1.Text = ""
End Sub

Private Sub Command4_Click()
主窗口.Show
方法1.Hide
End Sub

Private Sub Form_Load()
MSFlexGrid1.ColAlignment(0) = 4
For i = 1 To 10
    MSFlexGrid1.TextMatrix(i, 0) = i
Next i
End Sub

Private Sub JieFangCheng(A() As Single, B() As Single, X() As Single)
N = UBound(B)
Dim TempA As Single, L As Integer, k As Integer, Kk As Integer
Dim Ii As Integer, ChuShu As Single, Sum As Single
For i = 1 To N
    L = 0: Kk = 0
    For j = i To N
      If A(j, i) = 0 Then L = L + 1
    Next j
    For j = i To N - L
      If A(j, i) = 0 Then
        Kk = Kk + 1
        For k = i To N
           TempA = A(j, k)
           A(j, k) = A(N - Kk + 1, k)
           A(N - Kk + 1, k) = TempA
        Next k
        TempA = B(j): B(j) = B(N - Kk + 1): B(N - Kk + 1) = TempA
      End If
    Next j
              
    For Ii = i To N - L
      ChuShu = A(Ii, i)
      For j = i To N
         A(Ii, j) = A(Ii, j) / ChuShu
      Next j
      B(Ii) = B(Ii) / ChuShu
    Next Ii
    For Ii = i + 1 To N - L
      For j = i To N
         A(Ii, j) = A(Ii, j) - A(i, j)
      Next j
      B(Ii) = B(Ii) - B(i)
    Next Ii
Next i
For i = 1 To N
    For j = 1 To i - 1
      A(i, j) = 0
    Next j
Next i
      
      
X(N) = B(N) / A(N, N)
For i = N - 1 To 1 Step -1
   Sum = 0
   For j = i + 1 To N
      Sum = Sum + A(i, j) * X(j)
   Next j
   X(i) = (B(i) - Sum) / A(i, i)
Next i

End Sub

Private Sub Timer1_Timer()
If Label1.Left > 6000 Then
Label1.Left = 0
Else
Label1.Left = Label1.Left + 50
End If
End Sub