form1.frm

好用啊

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   1590
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   4680
   LinkTopic       =   "Form1"
   ScaleHeight     =   1590
   ScaleWidth      =   4680
   StartUpPosition =   3  '窗口缺省
   Begin VB.CommandButton cmdFib 
      Caption         =   "Command1"
      Height          =   495
      Left            =   2760
      TabIndex        =   2
      Top             =   600
      Width           =   1095
   End
   Begin VB.TextBox txtoutput 
      Height          =   375
      Left            =   600
      TabIndex        =   1
      Top             =   840
      Width           =   1455
   End
   Begin VB.TextBox txtInput 
      Height          =   375
      Left            =   600
      TabIndex        =   0
      Top             =   240
      Width           =   1455
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Private Sub cmdFib_Click()
    Dim intNumber As Integer
    intNumber = CInt(txtInput.Text)
    If intNumber = 1 Or intNumber = 2 Then      ' 如果是第1、2项，直接得出1
        txtoutput.Text = 1
    Else                                ' 如果求的是第2项以后的值，使用循环
        Dim int1 As Integer, int2 As Integer
        Dim intResult As Long
        Dim intc As Integer
        int1 = 1: int2 = 1
        For intc = 3 To intNumber                               ' For循环
            intResult = int1 + int2
            int1 = int2         ' 这条语句与下一条语句是否可以交换位置？
            int2 = intResult                        ' 注意如何交换变量的值
        Next
        txtoutput.Text = intResult                          ' 输出结果
    End If
End Sub