VB程序设计编程考试题及答案.doc

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 = 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 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(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 = 80 And a = 70 And a = 60 And a 70 Then Print 及格If a n1 Then m = m1: n = n1 Else m = n1: n = m1 End If r = m Mod n Do While r 0 m = 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 iPrint “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 Thens3 = 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(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 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 =2 ）18. 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Private 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()Dim a(1 To 10)RandomizeFor 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 Sub 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) = I