VB小常识.doc

VB期末范围题总汇1 求随机10个整数的最大值、最小值、平均值以及和；Dim a(1 To 10)Private Sub Command1_Click()RandomizePicture1.Print 产生的随机数为：For i = 1 To 10a(i) = Int(Rnd * 99 + 1)Picture1.Print a(i);Next iPicture1.PrintEnd SubPrivate Sub Command2_Click()Dim max, min, avemax = a(1)min = a(1)ave = 0.1 * a(1)For i = 2 To 10If a(i) max Then max = a(i)If a(i) n1 Then 为了求最小公倍数，增加m,n变量m = m1: n = n1Elsem = n1: n = m1End IfDor = m Mod nIf r = 0 Then Exit Dom = nn = rLoopPrint n1; ,; m1; 的最大公约数为; nPrint 最小公倍数=, m1 * n1 / nEnd Sub7.求逆序数（感觉题目类型太多）8. 级数有限项求和问题（题目类型太多）9. 求质因子问题Private Sub Command1_Click()Dim N As Integer, I As IntegerN = Val(InputBox(请输入2的整数:)I = 2DoIf N Mod I = 0 ThenPrint I;N = N IElseI = I 1End IfLoop While N 1End Sub10. 字符统计Option Base1Option ExplicitPrivate Sub Command1_Click()Dim i as integer，A(26) as integer，n as integerDim S as string*1,Strl as stringStrl=Text1n=Len(Strl)For i=1 To nS=Mid(Strl,i,1)If UCase(S)=”A” And UCase(S)=”Z” ThenA(Asc(UCase(S)-64)+1End IfNext iFor i=1 To 26List1.Additem Chr(64+i) & “:” & A(i)Netx iEnd SubPrivate Sub Command_Click()EndEnd Sub第二大题1. 判定素数过程Function isprime(Num As Long) As BooleanIf Num = B, A, B) x存入最大值Y = IIf(A a(j) Thent = a(j - 1)a(j - 1) = a(j)a(j) = tEnd IfNextNextEnd Sub4顺序查找过程Private Sub Command1_Click()Dim i, j, t, a(1 To 10)RandomizePrint 原数组:For i = 1 To 10a(i) = Rnd * 10Print a( & i & ) = & a(i) & Space(2),If i Mod 2 = 0 Then PrintN