绘图程序

开发平台：
Visual Basic

Form1.frm：源码内容
							VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   7695
   ClientLeft      =   60
   ClientTop       =   450
   ClientWidth     =   10875
   LinkTopic       =   "Form1"
   ScaleHeight     =   7695
   ScaleWidth      =   10875
   StartUpPosition =   3  '窗口缺省
   Begin VB.TextBox Text2 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   26.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   735
      Left            =   2040
      TabIndex        =   8
      Top             =   4080
      Width           =   1935
   End
   Begin VB.TextBox Text1 
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   26.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   735
      Left            =   2040
      TabIndex        =   7
      Top             =   2880
      Width           =   1935
   End
   Begin VB.PictureBox Picture1 
      Height          =   3735
      Left            =   4440
      ScaleHeight     =   3675
      ScaleWidth      =   6315
      TabIndex        =   4
      Top             =   1560
      Width           =   6375
   End
   Begin VB.CommandButton Command3 
      Caption         =   "结束"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   21.75
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   855
      Left            =   7680
      TabIndex        =   3
      Top             =   6240
      Width           =   1695
   End
   Begin VB.CommandButton Command2 
      Caption         =   "清除"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   21.75
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   855
      Left            =   4560
      TabIndex        =   2
      Top             =   6240
      Width           =   1695
   End
   Begin VB.CommandButton Command1 
      Caption         =   "绘图"
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   21.75
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   855
      Left            =   1440
      TabIndex        =   1
      Top             =   6240
      Width           =   1695
   End
   Begin VB.ComboBox Combo1 
      Height          =   300
      ItemData        =   "Form1.frx":0000
      Left            =   840
      List            =   "Form1.frx":0010
      TabIndex        =   0
      Top             =   1800
      Width           =   3255
   End
   Begin VB.Label Label3 
      Caption         =   "Label3"
      Height          =   615
      Left            =   5880
      TabIndex        =   9
      Top             =   840
      Width           =   3375
   End
   Begin VB.Label Label2 
      Caption         =   "z="
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   26.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   615
      Left            =   960
      TabIndex        =   6
      Top             =   4080
      Width           =   735
   End
   Begin VB.Label Label1 
      Caption         =   "w="
      BeginProperty Font 
         Name            =   "宋体"
         Size            =   26.25
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   615
      Left            =   960
      TabIndex        =   5
      Top             =   2880
      Width           =   735
   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 x!, y!, z!, c!, w As Single
Dim a
x = 0.01
w = Text1.Text
z = Text2.Text
c = w * x
Do
If x = 5000 Then
Exit Do
Else
Select Case Combo1.ListIndex
Case 0
y = 500 * Sin(w * x * 3.1415926 / 180) + 500 * z + 1500
Case 1
y = 500 * Cos(w * x * 3.1415926 / 180) + 500 * z + 1500
Case 2
y = 50 * Tan(w * x * 3.1415926 / 180) + 50 * z + 1500
Case 3
If c = 0 Then
a = MsgBox("无效数字", 16, "警告")
Exit Do
Else
y = 150 / Tan(w * x * 3.1415926 / 180) + 150 * z + 1500
End If
End Select
Picture1.PSet (x, y)
x = x + 0.01
End If
Loop While x <= 5000
End Sub
Private Sub Command2_Click()
Picture1.Cls
End Sub
Private Sub Command3_Click()
Unload Me
End Sub

						