计算器.frm

算法教案

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "计算器"
   ClientHeight    =   3990
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   3765
   LinkTopic       =   "Form1"
   ScaleHeight     =   3990
   ScaleWidth      =   3765
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton Command4 
      Caption         =   "所有因子"
      Height          =   375
      Left            =   2400
      TabIndex        =   14
      Top             =   2760
      Width           =   1095
   End
   Begin VB.CommandButton Command3 
      Caption         =   "开根"
      Height          =   375
      Left            =   2400
      TabIndex        =   13
      Top             =   2160
      Width           =   1095
   End
   Begin VB.CommandButton Command2 
      Caption         =   "AC"
      Height          =   375
      Left            =   2400
      TabIndex        =   12
      Top             =   1560
      Width           =   1095
   End
   Begin VB.CommandButton Command1 
      Caption         =   "9"
      Height          =   375
      Index           =   9
      Left            =   1560
      TabIndex        =   11
      Top             =   1560
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "8"
      Height          =   375
      Index           =   8
      Left            =   840
      TabIndex        =   10
      Top             =   1560
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "7"
      Height          =   375
      Index           =   7
      Left            =   120
      TabIndex        =   9
      Top             =   1560
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "6"
      Height          =   375
      Index           =   6
      Left            =   120
      TabIndex        =   8
      Top             =   2160
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "5"
      Height          =   375
      Index           =   5
      Left            =   840
      TabIndex        =   7
      Top             =   2160
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "4"
      Height          =   375
      Index           =   4
      Left            =   1560
      TabIndex        =   6
      Top             =   2160
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "3"
      Height          =   375
      Index           =   3
      Left            =   120
      TabIndex        =   5
      Top             =   2760
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "2"
      Height          =   375
      Index           =   2
      Left            =   840
      TabIndex        =   4
      Top             =   2760
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "1"
      Height          =   375
      Index           =   1
      Left            =   1560
      TabIndex        =   3
      Top             =   2760
      Width           =   495
   End
   Begin VB.CommandButton Command1 
      Caption         =   "0"
      Height          =   375
      Index           =   0
      Left            =   120
      TabIndex        =   2
      Top             =   3360
      Width           =   1935
   End
   Begin VB.TextBox Text2 
      BackColor       =   &H0000FFFF&
      Height          =   375
      Left            =   240
      TabIndex        =   1
      Top             =   840
      Width           =   3255
   End
   Begin VB.TextBox Text1 
      BackColor       =   &H00FF0000&
      Height          =   375
      Left            =   240
      TabIndex        =   0
      Top             =   120
      Width           =   3255
   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(Index As Integer)
    Dim n As Long
    n = Val(Text2.Text)
    If (n * 10 + Index) < 100000000 Then Text2.Text = Str(n * 10 + Index)  '设置n的最大数1亿
End Sub

Private Sub Command2_Click()
    Text2.Text = ""
End Sub

Private Sub Command3_Click()
    Dim a, x As Double
    Dim i As Integer
    x = 2                            '设置初始推测值为x为2
    a = Val(Text2.Text)
    For i = 1 To 10000               '重复迭代10000次
        x = (x + a / x) / 2
    Next i
    Text1.Text = Str(x)              '输出结果到Text1.text
End Sub

Private Sub Command4_Click()
    Dim n, i As Long
    Dim s As String
    n = Val(Text2.Text)
    For i = 1 To n
        If n Mod i = 0 Then           '求解n的因子
            s = s + Str(i) + " "      '将结果先存储在S中
        End If
    Next i
    Text1.Text = s                   '输出结果到Text1.Text
End Sub

Private Sub Form_Load()
  Text1.Text = ""
  Text2.Text = ""
End Sub