VB经典题目

Vb编程题1.求自然数1～100之间奇数之和。

Private Sub Form_Click()Dim i%, sum%For i = 1 To 99 Step 2sum = sum + iNext iPrint "sum="; sumEnd Sub2.求自然数1～100之间偶数之和。

Private Sub Form_Click()Dim i%, sum%For i = 1 To 100If i mod 2=0 thensum = sum + iend ifNext iPrint "sum="; sumEnd Sub3.编写程序，在窗体上随机输出一个10--99之间的两位整数。

Sub command1_click()Dim a%Randomizea=int(rnd*90+10)print aend sub4.编程计算从200到1000之间的所有4的倍数之和。

Private Sub Form_Click()Dim sum As Longsum = 0For i = 200 To 1000If i Mod 4 = 0 Thensum = sum + iEnd IfNext iPrint sumEnd Sub5.编写程序在窗体上显示出：5/6+4/5+3/4+2/3+1/2Dim s As Singles = 0For i = 5 To 1 Step -1s = s + i / (i + 1)NextPrint “5/6+4/5+3/4+2/3+1/2=”;s6.在窗体的单击事件中编写程序，从键盘上任意输入3个数，输出最大数。

Private Sub Command2_Click()Clsa = Val(InputBox("接收三个数:"))Print a;Max = aFor i = 1 To 2a = Val(InputBox("接收三个数:"))Print a;If a > Max Then Max = aNextPrintPrint "三数中最大者是:"; MaxEnd Sub7.在窗体的单击事件中编写程序，从键盘上任意输入3个数，输出中间数。

累加求和1到100Private Sub Command1_Click()Dim i As Integer, sum As Integersum = 0For i = 1 To 100sum = sum + iNextText1.Text = sumEnd SubPrivate Sub Command2_Click()EndEnd Sub1到100的奇数和Private Sub Command1_Click()Dim i As Integer, sum As Integersum = 0For i = 1 To 100 step 2sum = sum + iNextText1.Text = sumEnd SubPrivate Sub Command2_Click()End求n!Private Sub Command1_Click()Dim fact As Double, n As Integer, i As Integer n = Val(Text1.Text)fact = 1For i = 1 To nfact = fact * iNextText2.Text = factEnd Sub累加求和1到100（Do while）Private Sub Command1_Click()Dim i As Integer, sum As Integersum = 0i = 1Do While i <= 100sum = sum + ii = i + 1LoopText1.Text = sumEnd SubPrivate Sub Command2_Click()EndEnd Sub（Do Until）Private Sub Command1_Click()Dim i As Integer, sum As Integersum = 0i = 1Do until i >100sum = sum + ii = i + 1LoopText1.Text = sumEnd SubPrivate Sub Command2_Click()EndEnd Sub求平均成绩Private Sub Command1_Click()Dim a As Single, b As Single, c As Single, d As Single Dim pj As Singlea = 60:b = 70:c = 80:d = 90pj = (a + b + c + d) / 4Text1.Text = Str(pj)End Sub求圆的周长Private Sub Command1_Click()Dim r As DoubleConst pi = 3.1415926r = Val(InputBox("请输入圆的半径"))Print "圆的周长为:", 2 * pi * rEnd Sub输入两个整数m n，使得m>=n,并输出m nPrivate Sub Command1_Click()Dim m As Integer, n As Integer, a As Integerm = Val(InputBox("请输入m:", 输入, "m"))n = Val(InputBox("请输入n:", 输入, "n"))If n > m Thena = mm = nn = aEnd IfPrint "m=", mPrint "n=", nEnd Sub计算sum=1/1!+1/2!......+1/10!Private Sub Command1_Click()Dim m As Integer, n As Long, s As Doublen = 1s = 0For m = 1 To 10n = n * ms = s + 1 / nNextPrint sEnd Sub定义一个下标上界为10的整型数组，并随机函数为其赋值（值处于【0,100】之间，计算数组中所有偶数的和Private Sub Command1_Click()RandomizeDim a%(10)Dim i%, s%For i = 0 To 10a(i) = 101 * Rnd()NextFor i = 0 To 10If a(i) Mod 2 = 0 Thens = s + a(i)End IfNextPrint "所有偶数的和为:", sEnd Sub输入一个四位数，分别输出它的个位数字、十位数字、百位数字、和千位数字。

V B程序设计30道编程题------------------------------------------作者xxxx------------------------------------------日期xxxx'1.输入3个数，输出最大的数Private Sub Command11_Click()Dim max%X1=Val(InputBox("input"))X2=Val(InputBox("input"))x3=Val(InputBox("input"))max=X1If max<=X2 Thenmax=X2End IfIf max<=x3 Thenmax=x3End IfMsgBox("3个数之中的最大数max="&max)End SubPrivate Sub Command12_Click()'2.'有一元二次方程：aX2+bX+c=0，依次输入a，b，c，判断此方程是否有实根a=Val(InputBox("input"))B=Val(InputBox("input"))c=Val(InputBox("input"))s=B^2-4*a*cIf a<>0 ThenIf s=0 ThenMsgBox("两个相等实根")ElseIf s>0 ThenMsgBox("两个不相等实根")ElseIf s<0 ThenMsgBox("两个不相等虚根")End IfElseMsgBox("无解")End IfEnd SubPrivate Sub Command13_Click()'3.输入一个百分制的成绩，若大于等于60，则用消息框弹出，显示"恭喜！成绩通过！"，若小于60，则弹出消息框，显示"抱歉！成绩没有通过！"X=Val(InputBox("input"))If X>=60 ThenMsgBox("恭喜！成绩通过！")ElseMsgBox("抱歉！成绩没有通过！")End If End SubPrivate Sub Command14_Click()'4.输入一年份，判断它是否为闰年，并显示有关信息。

V B经典例题13道(附答案)1.一串字符求有多少字母，有多少数字，有多少其他Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim s, c, q, w, rs = TextBox1.TextFor i = 1 To Len(s)c = Mid(s, i, 1)If UCase(c) >= "A" And UCase(c) <= "Z" Thenq = q + 1ElseIf c >= "0" And c <= "9" Thenw = w + 1Elser = r + 1End IfNextLabel1.Text = "字母有" & q & "个数字有" & w & "个其他有" & r & "个" End Sub2.一串字符以？结尾，求有多少字母，有多少数字，有多少其他Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim s, a, z, x, c, is = TextBox1.Texta = Mid(s, 1, 1)i = 1Do While a <> "?"If UCase(a) >= "A" And UCase(a) <= "Z" Thenz = z + 1ElseIf a >= "0" And a <= "9" Thenx = x + 1Elsec = c + 1End Ifi = i + 1a = Mid(s, i, 1)LoopLabel1.Text = z & x & cEnd Sub3.给定一个数字求它是几位数字，如（1）.12345 (2).-12345 (3).123.45 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Clicks = TextBox1.Textc = Trim(Str(s))If Int(c) = c ThenIf c >= 0 ThenLabel1.Text = "是" & Len(c) & "位数"ElseLabel1.Text = "是" & Len(c) - 1 & "位数"End IfElseIf c >= 0 ThenFor i = 1 To Len(c)If Mid(c, i, 1) = "." Then Exit Forj = j + 1NextLabel1.Text = "小数点前有" & j & "位数 " & " 小数点后有" & Len(c) - j - 1 & "位数 "ElseFor i = 1 To Len(c)If Mid(c, i, 1) = "." Then Exit Forj = j + 1NextLabel1.Text = "小数点前有" & j - 1 & "位数 " & " 小数点后有" & Len(c) - j - 1 & "位数 "End IfEnd IfEnd Sub4.求圆周率公式Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim a, s, n, pia = 1n = 1While Math.Abs(1 / n) > 0.0001pi = pi + a * (1 / n)n = n + 2a = -aLabel1.Text = 4 * piEnd Sub5.求自然对数e 公式e=1+1+1/2!+1/3!+…+1/n!+….Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim n, e1, ln = 1e1 = 1While 1 / n > 0.01l = 1For i = 1 To nl = l * iNextn = n + 1e1 = e1 + 1 / lEnd WhileLabel1.Text = e1End Sub6.右直角三角形Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim n, sLabel1.Text = ""n = Val(TextBox1.Text)For i = 1 To ns = ""Label1.Text &= Space(n - i)For j = 1 To is &= "*"NextLabel1.Text &= s & vbCrLfNextEnd Sub7．等腰三角形Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim n, sLabel1.Text = ""n = Val(TextBox1.Text)For i = 1 To nLabel1.Text &= Space(n - i)For j = 1 To 2 * i - 1s &= "*"NextLabel1.Text &= s & vbCrLfNextEnd Sub8．倒等腰三角形Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim n, sLabel1.Text = ""n = Val(TextBox1.Text)For i = n To 1 Step -1s = ""Label1.Text &= Space(n - i)For j = 2 * i - 1 To 1 Step -1s &= "*"NextLabel1.Text &= s & vbCrLfNextEnd Sub9．右上角的直角三角形Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim n, sLabel1.Text = ""n = Val(TextBox1.Text)For i = n To 1 Step -1s = ""Label1.Text &= Space(n - i)For j = i To 1 Step -1s &= "*"NextLabel1.Text &= s & vbCrLfNextEnd Sub10．菱形Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickLabel1.Text = ""For i = 1 To 6s = ""Label1.Text &= Space(i - 1)For j = 1 To 12s &= "*"NextLabel1.Text &= s & vbCrLfNextEnd Sub11.水仙花数字三位数字的个位数字的立方和等于该数字本身（1）.判断输入的数字是否是水仙花数Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim s, a, b, cs = Val(TextBox1.Text)Label1.Text = ""a = s \ 100b = (s - a * 100) \ 10c = s Mod 10If a ^ 3 + b ^ 3 + c ^ 3 = s ThenLabel1.Text &= s & "是水仙花数"ElseLabel1.Text &= s & "不是水仙花数"End IfEnd Sub（2）.找出所有的水仙花数Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim s, a, b, cLabel1.Text = "水仙花数是" & vbCrLfFor s = 100 To 999a = s \ 100b = (s - a * 100) \ 10c = s Mod 10If a ^ 3 + b ^ 3 + c ^ 3 = s ThenLabel1.Text &= s & vbCrLfNextEnd Sub12.完全数正整数的因数之和等于这个数（1）.判断输入的数字是不是完全数Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim s, j, l, a(100)s = Val(TextBox1.Text)j = 1For i = 1 To s - 1If s Mod i = 0 Thena(j) = ij = j + 1End IfNextFor i = 1 To jl = l + a(i)NextIf l = s ThenLabel1.Text = s & "是完全数"ElseLabel1.Text = s & "不是完全数"End IfEnd Sub（2）.找出1到n内的完全数,n 由用户输入Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim n, jn = Val(TextBox1.Text)Label1.Text = ""For p = 2 To nj = 0For i = 1 To p - 1If p Mod i = 0 Thenj = j + iEnd IfNextIf j = p ThenLabel1.Text &= p & " "End IfNextEnd Sub13.显示1，1，2，3，5，8，13，21…… F(i)=f(i-1)+ f(i-2)Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.ClickDim f(30)f(1) = 1f(2) = 1For i = 3 To 30f(i) = f(i - 1) + f(i - 2)NextLabel1.Text = ""For i = 1 To 30Label1.Text &= f(i) & ","If i Mod 6 = 0 Then Label1.Text &= vbCrLfNextEnd Sub。