重庆医科大学 VB上机.docx

1、重庆医科大学 VB上机1利用随机函数产生25个100到999之间的整数，构成55的矩阵，输出该矩阵。Private Sub Form_Click()Dim m%, n%For i = 1 To 25m = Int(Rnd * 900 + 100)Print m;If i Mod 5 = 0 Then PrintNext iEnd Sub 2利用随机函数产生25个10到99之间的整数，求其平均值(要求保留3位小数，第4位四舍五入)。Private Sub Form_Click()Dim k#, n%n = 0For i = 1 To 25m = Int(Rnd * 90 + 10)Print m

2、;n = n + mNext iPrintPrint 25个数的和为：, nk = n / 25Print 25个数的平均值为：, Format(k, #.000)End Sub3利用随机函数产生25个10到99之间的整数，按从小到大的顺序显示。Private Sub Form_Click()Dim a%(1 To 25)For i = 1 To 25a(i) = Int(Rnd * 90 + 10)Print a(i);Next iPrintFor i = 1 To 24p = iFor j = i + 1 To 25If a(p) a(j) Then p = jNext jt = a(i)

3、: a(i) = a(p): a(p) = tNext iPrint 从小到大排序为：;For i = 1 To 25Print a(i);Next iEnd Sub4 利用随机函数产生50个 1,6 之间的整数, 分别统计出1的个数，2的个数，3的个数，4的个数，5的个数和6的个数。Private Sub Form_Click()a1 = 0a2 = 0a3 = 0a4 = 0 a5=0 a6=0For i = 1 To 50m = Int(Rnd * 6 + 1)Print m;If m = 1 Then a1 = a1 + 1If m = 2 Then a2 = a2 + 1If m =

4、 3 Then a3 = a3 + 1 If m = 4 Then a4 = a4 + 1If m = 5 Then a5 = a5 + 1If m = 6 Then a6= a6 + 1Next iPrintPrint 1的个数为：, a1Print 2的个数为：, a2Print 3的个数为：, a3 Print 4的个数为：, a4Print 5的个数为：, a5 Print 6的个数为：, a6End Sub5 利用随机函数产生并显示10个3位数的正整数，找出其中的最大数。Private Sub Form_Click()Dim a%(1 To 10)Dim max%For i = 1

5、To 10a(i) = Int(Rnd * 900 + 100)Print a(i);If a(i) max Then max = a(i)PrintNext iPrint 最大数为：; maxEnd Sub6利用随机函数产生并显示10个4位数的正整数，找出其中的最小数、最大数。Private Sub Form_Click()Dim a%(1 To 10)Dim min%For i = 1 To 10a(i) = Int(Rnd * 9000 + 1000)Print a(i);Next imin = a(1)For i = 2 To 10If a(i) max Then max = a(i)

6、Next iPrintPrint 最小数为：; min, 最大数为：; maxEnd Sub7 从键盘输入10个数，按输入的顺序和按输入顺序相反的顺序输出。Private Sub Form_Click()Dim a%(1 To 10)Print 顺序显示For i = 1 To 10a(i) = InputBox(请输入第 & i & 个数)Print a(i);Next iPrintPrint 反序输入For i = 10 To 1 Step -1Print a(i);Next iEnd Sub8 运行时单击窗口，调用Inputbox函数输入一个数，判断其是否为正整数，如果为正整数判断其奇偶

7、性，把结果信息显示在MsgBox对话框上Private Sub Form_Click() Dim m% m = Val(InputBox(请输入一个数) If m 0 Then If m Mod 2 = 0 Then Print MsgBox(m & 是正整数 & 并且 & m & 是偶数) Else Print MsgBox(m & 是正整数 & 但是 & m & 是奇数) End If End If If m 0 Then If m Mod 2 = 0 Then Print MsgBox(m & 是正整数 & 并且 & m & 是偶数) Else Print MsgBox(m & 是正整数

8、 & 但是 & m & 是奇数) End If End If If m 0 Then MsgBox (m & 不是正整数，因此不判断奇偶性) End If End Sub11 从文本框输入一个正整数，判断该数是否为素数。建立一个Text和CommandButtonPrivate Sub Command1_Click()Dim N As Long, Flags As BooleanN = Val(Text1.Text)Flags = TrueFor i = 2 To Sqr(N)If N Mod i = 0 ThenFlags = FalseExit ForEnd IfNextMsgBox N

9、& IIf(Flags, , 不) & 是一个素数End Sub另外一个方法 建立一个命令 1个Text，1个Label 1个CommandButtonPrivate Sub Command1_Click()Dim x%, i%x = Val(Text1.Text)Tag = TrueFor i = 2 To x - 1If x Mod i = 0 ThenTag = FalseExit ForEnd IfNext iIf Tag = True ThenLabel1.Caption = Text1.Text & 是素数ElseLabel1.Caption = Text1.Text & 不是素数

10、End IfEnd Sub12 利用Inpubox函数输入2个正整数，求其最小公倍数，结果用Msgbox函数显示。 Private Sub Form_Click() Dim m%, n%, r%, t% m = Val(InputBox(输入第一个正整数) n = Val(InputBox(输入第二个正整数) If m n Then t = m: m = n: n = t t = m * n Do r = m Mod n n = r Loop Until r = 0 Print MsgBox(这两个数的最小公倍数是： & t / m) End Sub13 输入一个整数，编写一函数判断该数是否同

11、时是2和7的倍数Private Sub Form_Click()Dim m%m = Val(InputBox(请输入一个整数)If m Mod 2 = 0 And m Mod 7 = 0 ThenPrint m; 同时是2和7的倍数ElsePrint m; 不同时是2和7的倍数End IfEnd Sub14 编程计算下列公式的值，其中n (10)为从键盘输入的正整数。S=2!+4!+6!+(2*n)!Private Sub Form_Click()Dim s#, i%, j%, x%x = InputBox(请输入小于10的正整数)sum = 0For i = 1 To xs = 1For j

12、 = 1 To 2 * i s = s * jNext jsum = sum + sNext iPrint sumEnd SubS=1!+3!+5!+(2*n-1)!Private Sub Form_Click()Dim s#, i%, j%, x%x = InputBox(请输入小于10的正整数)sum = 0For i = 1 To xs = 1For j = 1 To 2 * i - 1s = s * jNext jsum = sum + sNext iPrint sumEnd SubS=1!+2!+3!+n!Private Sub Form_Click()Dim n%n = Val(I

13、nputBox(输入n的值(n10)Sum = 0For i = 1 To ns = 1For j = 1 To is = s * jNext jSum = Sum + sNext iPrint SumEnd Sub15 在窗体上按上鼠标的右键，记录其的坐标。建立Lable1Private Sub Form_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)Label1.Caption = X & , & YEnd Sub16 在文本框中输入一些英语单词，统计空格的个数。建立1个CommandButton，1个Text ,1个LabelPrivate Sub Command1_Click()n = 0strold = s = Text1.TextFo