practice6_16.frm

来自「深圳大学的vb上机与教学的课件」· FRM 代码 · 共 117 行

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "求sin(x)的近似值"
   ClientHeight    =   2010
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   2010
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.TextBox Text2 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   14.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   585
      Left            =   1680
      TabIndex        =   4
      Top             =   1080
      Width           =   2775
   End
   Begin VB.CommandButton Command1 
      Caption         =   "sin(x)="
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   14.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   495
      Left            =   240
      TabIndex        =   3
      Top             =   1080
      Width           =   1335
   End
   Begin VB.TextBox Text1 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   14.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   465
      Left            =   1680
      TabIndex        =   1
      Top             =   240
      Width           =   1695
   End
   Begin VB.Label Label2 
      AutoSize        =   -1  'True
      Caption         =   "(角度)"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   14.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   285
      Left            =   3480
      TabIndex        =   2
      Top             =   360
      Width           =   930
   End
   Begin VB.Label Label1 
      Caption         =   "请输入X:"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   14.25
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   255
      Left            =   240
      TabIndex        =   0
      Top             =   360
      Width           =   1335
   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()
  X = Val(Text1.Text) * 3.1415926535898 / 180
  n = 1
  t1 = X    '分子
  t2 = 1    '分母
  sinx = 0
  Do While t1 / t2 > 0.0000001
    sinx = sinx + (-1) ^ (n - 1) * t1 / t2
    n = n + 1
    t1 = t1 * X ^ 2
    t2 = t2 * (2 * n - 2) * (2 * n - 1)
  Loop
  Text2.Text = Format(sinx, "0.000000")
End Sub