VB程序设计编程考试题及答案

1、VB程序设计编程考试题及答案1. 输入3个数，输出最大的数Private Sub command1_click()Dim maxFor i = 1 To 3n = Val(InputBox("输入第" & i & "个数")If n > max Thenmax = nEnd IfNextPrint "三个数中最大的数是" ; maxEnd Sub2. 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Private Sub Command1_Click()Dim a, b, c, na

2、 = Text1b = Text2c = Text3n = b * b - 4 * a * cIf n >= 0 ThenLabel4 = "方程有根" Else Label4 = "方程无根"End IfEnd Sub3. 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！Private Sub Form_Load()Text1 = ""End SubPrivate Sub Command1_Click()Dim nn = Text1If n &

3、gt; =60 ThenVal (MsgBox("恭喜！成绩通过！")ElseVal (MsgBox("抱歉！成绩没有通过！")End IfEnd Sub4. 输入一年份，判断它是否为闰年，并显示有关信息。（判断闰年的条件是：年份能被4整除但不能被100整除，或者能被400整除）Private Sub Command1_Click()Dim y%y = InputBox("请输入年份")If y Mod 4 = 0 And y Mod 100 <> 0 Or y Mod 400 = 0 ThenVal (MsgBox(&q

4、uot;闰年！")ElseVal (MsgBox("平年！")End IfEnd Sub5. 输入学生的百分制成绩，转换输出为五级制成绩，90100分转换为优秀，8089转换为良好，7079转换为中等，6069转换为及格，060转换为不及格。Private Sub Command1_Click()a = Val(InputBox("请输入成绩")If a > 100 Then Print "超出范围"If a >= 90 And a <= 100 Then Print "优秀"If a

5、>= 80 And a < 90 Then Print "良好"If a >= 70 And a < 80 Then Print "中等"If a >= 60 And a < 70 Then Print "及格"If a < 60 Then Print "不及格"End Sub6. 随机产生一个三位正整数，然后逆序输出，产生的数与逆序数同时显示。例如，产生246，输出是642。Private Sub Command1_Click()Dim x%, x1%, x2%, x3%

6、x = Text1x1 = x Mod 10x2 = (x Mod 100) 10x3 = x 100Label1 = x1 * 100 + x2 * 10 + x3End Sub7. 输入两个整数，求它们的最大公约数。private Sub Command1_Click() n1 = InputBox("输入n") m1 = InputBox("输入m") If m1 > n1 Then m = m1: n = n1 Else m = n1: n = m1 End If r = m Mod n Do While r <> 0 m =

7、n n = r r = m Mod n LoopPrint "m n 的最大公约数是：" nEnd Sub8. 编程求200-400范围内5的倍数或7的倍数之和。(一个数如果同时是7和5的倍数，则只能加一次。Private Sub Command1_Click()For i = 200 To 400If i Mod 5 = 0 Or i Mod 7 = 0 ThenSum = Sum + iEnd IfNext iFor i = 200 To 400If i Mod 5 = 0 And i Mod 7 = 0 ThenSum = Sum - iEnd IfNext iPri

8、nt “倍数之和=”; SumEnd Sub9. 计算100300之间所有能被3和7整除的数之和Private Sub Command1_Click()Dim iSum = 0For i = 100 To 300If i Mod 3 = 0 And i Mod 7 = 0 ThenSum = Sum + iEnd IfNext iPrint SumEnd Sub10. 分别统计1-100中，满足3的倍数、7的倍数的数各有多少。Private Sub Command1_Click()Dim i, s3, s7s3 = 0s7 = 0For i = 1 To 100If i Mod 3 = 0 T

9、hens3 = s3 + 1End IfNext iFor i = 1 To 100If i Mod 7 = 0 Thens7 = s7 + 1End IfNext iPrint "3的倍数" s3Print "7的倍数" s7End Sub11. 某次歌曲大奖赛，有7个评委。如果分别输入7个评委对某个参赛者的打分数，按照去掉一个最高分和一个最低分的计算办法，求出该参赛者的平均得分。Private Sub Command1_Click()Dim max, a(1 To 7), min, sFor i = 1 To 7a(i) = Val(InputBox

10、("输入第" & i & "个数")Next imax = a(1)min = a(1)s = a(1)For i = 2 To 7If a(i) > max Then max = a(i)If a(i) < min Then min = a(i)s = s + a(i)Next is = s - min - maxs = s / 5Print "平均分" sEnd Sub12. 输入一串字符，统计其中字母A(不区分大小写)出现的次数。Private Sub Command1_Click()Dim c As

11、 String, a As Integerb = InputBox("请输入字符")For i = 1 To Len(b) c = UCase(Mid(b, i, 1) If c = "A" Then a = a + 1 End If Next i Print "a出现的次数：" aEnd Sub13. 我国目前有13亿人口，按人口年增长率0.8%计算，多少年后我国人口将超过26亿。Private Sub Command1_Click()Dim a, ia = 13i = 0Do While a < 26 a = a * (1.

12、008)i = i + 1LoopPrint iEnd Sub14. 小猴有桃若干，第一天吃掉一半多一个；第二天吃剩下桃子的一半多一个；以后每天都吃尚存桃子的一半多一个，到第7天只剩一个，问小猴原有桃多少？Private Sub Command1_Click()Dim a, ia = 1For i = 1 To 6a = 2 * (a + 1)Next iPrint "小猴原有桃" a;”只”End Sub15. 求100以内的素数Private Sub Command1_Click()Dim i, jFor i = 2 To 100For j = 2 To i - 1If

13、 i Mod j = 0 Then Exit ForNext jIf j = i Then Print iNext iEnd Sub16. 百元买百鸡问题。假定小鸡每只5角，公鸡每只2元，母鸡每只3元，编程求解购鸡方案。Private Sub Command1_Click()Print "小鸡" " " "母鸡" " " "公鸡"Print ""For x = 1 To 100For y = 1 To 100For z = 1 To 100If 0.5 * x + 2 * y

14、 + 3 * z = 100 ThenPrint "" x; " " y; " " zEnd IfNext zNext yNext xEnd Sub17. 编程求斐波那契数列前11项。（斐波那契数列：F(0)=f(1)=1, F(n)=F(n-1)+F(n-2) n>=2 ）Private Sub Command1_Click()Dim F(11), i As LongF(0) = 1F(1) = 1For i = 2 To 10F(i) = F(i - 1) + F(i - 2)Next iFor i = 0 To 11Pri

15、nt F(i);Next iEnd Sub18. 将输入的字符串以反序显示。例如：输入“ASDFGT”，显示“TGFDSA”Private Sub Command1_Click()Dim a, b, c, d, na = InputBox("输入字符串")n = Len(a)For b = 1 To Int(n 2)c = Mid(a, b, 1)Mid(a, b, 1) = Mid(a, n - b + 1, 1) Mid(a, n - b + 1, 1) = cNext bPrint aEnd Sub19. 随机产生10个30,100内的整数，求最大值及所对应的下标Pr

16、ivate Sub Command1_Click()Dim a(1 To 10), mRandomizeFor I = 1 To 10a(I) = Int(Rnd * 71) + 30Print a(I)Next IMax = a(1)For I = 2 To 10If a(I) > Max Then Max = a(I): m = INext IPrint "max=" MaxPrint "max的下标为" mEnd Sub20. 随机产生10个30,100内的整数，求最大值、最小值和平均值。Private Sub Command1_Click(

17、)Dim a(1 To 10)For i = 1 To 10a(i) = Int(Rnd * 71) + 30Print a(i)Next iMax = a(1)Min = a(1)Avg = a(1)For i = 2 To 10If a(i) > Max Then Max = a(i)If a(i) < Min Then Min = a(i) Avg = Avg + a(i)Next iAvg = Avg / 10Print "max=" MaxPrint "min=" MinPrint "avg=" AvgEnd S

18、ub 21. 随机产生10个30,100内的整数，求最小值及所对应的下标。Private Sub Command1_Click()Dim a(1 To 10), mRandomizeFor I = 1 To 10a(I) = Int(Rnd * 71) + 30Print a(I)Next IMin = a(1)For I = 2 To 10If a(I) < Min Then Min = a(I): m = INext IPrint "min=" MinPrint "min的下标为" mEnd Sub22. 随机生成一个整型的二维数组，范围在10

19、,20之间，以下三角形式输出该数组。Private Sub Command1_Click()Dim a(1 To 10, 1 To 10), i, j As IntegerFor i = 1 To 10For j = 1 To 10a(i, j) = Int(Rnd *11 + 10)NextNextFor i = 1 To 10For j = 1 To iPrint Spc(3); a(i, j);NextPrintNextEnd Sub23. 随机产生10个1100的正整数放入数组，显示产生的数，求最大值、最小值、平均值。Private Sub Command1_Click()Dim a(

20、1 To 10)For i = 1 To 10a(i) = Int(Rnd * 101) + 1Print a(i)Next iMax = a(1)Min = a(1)Avg = a(1)For i = 2 To 10If a(i) > Max Then Max = a(i)If a(i) < Min Then Min = a(i) Avg = Avg + a(i)Next iAvg = Avg / 10Print "max=" MaxPrint "min=" MinPrint "avg=" AvgEnd Sub24. 利

21、用随机函数生成一个4×4的矩阵(即二维矩阵),范围是20,50内的整数,输出该矩阵所有数据之和Private Sub Command1_Click()Dim a%(4, 5), sumFor i = 1 To 4For j = 1 To 4a(i, j) = Int(Rnd * 31) + 20Print a(i, j);sum = sum + a(i, j)Next jPrint '换行Next iPrint "sum=" sumEnd Sub25. 已知有序数组a()，编程插入x（x的值为14）。数组a中的元素分别为12，6，4，89，75，63，10

22、0，20，31。Private Sub Command1_Click()Dim a(), i%, k%, x%, n%a = Array(4, 6, 12, 20, 31, 63, 75, 89, 100)n = UBound(a)x = Val(InputBox("请输入所要插入数")For k = 0 To nIf x < a(k) Then Exit ForNext kReDim Preserve a(n + 1)For i = n To k Step -1a(i + 1) = a(i)Next ia(k) = xFor i = 0 To n + 1Print

23、a(i);Next iEnd Sub26. 编写一函数，计算Double类型一维数组所有元素的平均值。27. 编一子过程ProcMin,求一维数组a中的最小值，子过程的形参自己确定Private Sub command1_Click()Dim a(1 To 10), min, i%For i = 1 To 10a(i) = Int(Rnd * 101)Print a(i);Next iCall ProcMin(a(), min)PrintPrint "min =" minEnd Sub Sub ProcMin(b(), min)Dim i%min = b(LBound(b)For i = LBound(b) + 1 To UBound(b)If b(i