求解一元二次方程.frm

来自「上传的包含两个文件」· FRM 代码 · 共 152 行

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   3090
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   3090
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command3 
      Caption         =   "Command3"
      Height          =   495
      Left            =   2880
      TabIndex        =   12
      Top             =   2400
      Width           =   975
   End
   Begin VB.CommandButton Command2 
      Caption         =   "Command2"
      Height          =   615
      Left            =   1440
      TabIndex        =   11
      Top             =   2280
      Width           =   975
   End
   Begin VB.CommandButton Command1 
      Caption         =   "Command1"
      Height          =   615
      Left            =   240
      TabIndex        =   10
      Top             =   2280
      Width           =   855
   End
   Begin VB.TextBox Text5 
      Height          =   495
      Left            =   3480
      TabIndex        =   9
      Text            =   "Text5"
      Top             =   1560
      Width           =   855
   End
   Begin VB.TextBox Text4 
      Height          =   495
      Left            =   1200
      TabIndex        =   8
      Text            =   "Text4"
      Top             =   1440
      Width           =   855
   End
   Begin VB.TextBox Text3 
      Height          =   615
      Left            =   3120
      TabIndex        =   7
      Text            =   "Text3"
      Top             =   720
      Width           =   975
   End
   Begin VB.TextBox Text2 
      Height          =   495
      Left            =   1440
      TabIndex        =   6
      Text            =   "Text2"
      Top             =   720
      Width           =   975
   End
   Begin VB.TextBox Text1 
      Height          =   495
      Left            =   120
      TabIndex        =   5
      Text            =   "Text1"
      Top             =   720
      Width           =   975
   End
   Begin VB.Label Label5 
      Caption         =   "第二根"
      Height          =   495
      Left            =   2400
      TabIndex        =   4
      Top             =   1440
      Width           =   855
   End
   Begin VB.Label Label4 
      Caption         =   "第一根"
      Height          =   255
      Left            =   120
      TabIndex        =   3
      Top             =   1560
      Width           =   855
   End
   Begin VB.Label Label3 
      Caption         =   "常数项"
      Height          =   495
      Left            =   3120
      TabIndex        =   2
      Top             =   0
      Width           =   975
   End
   Begin VB.Label Label2 
      Caption         =   "一次项"
      Height          =   375
      Left            =   1440
      TabIndex        =   1
      Top             =   120
      Width           =   855
   End
   Begin VB.Label Label1 
      Caption         =   "二次项"
      Height          =   375
      Left            =   120
      TabIndex        =   0
      Top             =   120
      Width           =   855
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub Command1_Click()
Dim a, b, c, d, e
Dim i As String
a = Val(Text1.Text): b = Val(Text2.Text): c = Val(Text3.Text)
If a = 0 Then MsgBox "不是二次方程": End
d = b * b - 4 * a * c
If d < 0 Then
  Beep
  e = Sqr(-d)
  Text4.Text = -b / (2 * a) & " + " & e / (2 * a) & "i"
  Text5.Text = -b / (2 * a) & "-" & e / (2 * a) & "i"
  Else
  e = Sqr(d)
  Text4.Text = (-b + e) / (2 * a)
  Text5.Text = (-b - e) / (2 * a)
End If
End Sub

Private Sub Command2_Click()
Text1.Text = " "
Text2.Text = " "
Text3.Text = " "
Text4.Text = " "
Text5.Text = " "
End Sub

Private Sub Command3_Click()
End
End Sub