Vb国家2级计算机考试编程复习题

程序复习题 1 产生1－100以内的素数 Private Sub Command1_Click() Dim i%, j%, tag As Boolean For j = 1 To 100 tag = True For i = 2 To j - 1 If j Mod i = 0 Then tag = False Next i If tag Then Print j; Next j End Sub 2.编程序随机产生10个不同的整数放入数组A中，再将这10个数按升序方式输出。。 Private Sub Form_Click() Dim a(1 to 10) as integer,minnum as integer For i=1 to 10 step 1 A(i)=int(rnd()*100)+1 Next i For i = 1 To 9 minnum =i For j = i + 1 To UBound(a) If a(j) Next j t = a(i): a(i) =a( minnum): a(minnum)= t Next i For i=1 to 10 Print a(i); Next i End Sub 3.0到200 被5 或11 整除的数的和 Private Sub Command1_Click() Dim i% For i = 0 To 200 If i Mod 11 = 0 Or i Mod 5 = 0 Then Sum = Sum + i End If Next i Print "总和是"; Sum End Sub 4输入一年份，判断他是否为闰年，并现实是否是闰年的有关信息。 Private Sub Command1_Click() Dim y% y = Val(Text1) If y Mod 4 = 0 And y Mod 100 <> 0 Or y Mod 400 = 0 Then MsgBox (y & "年是闰年") Else MsgBox (y & "年是平年") End If End Sub 5、已知x,y,z 3个变量中存放了3个不同的数，比较它们的大小并进行调整，使得xPrivate Sub Command1_Click() Dim x!, y!, z! x = InputBox("input x") y = InputBox("input y") z = InputBox("input z") Print Tab(8); " "; "x"; " y"; " z" Print "排序前:"; x; " "; y; " "; z If x < y Then t = x: x = y: y = t: If x < z Then t = x: x = z: z = t: If y < y Then t = y: y = z: z = t: Print "排序后:"; ""; x; " "; y; " "; z End Sub 6、求s=a+aa+aaa+...aaaaa（n个a），其中a和n的值随机产生，a的范围是[1,9]的整数，n的范围是[5,10]。如a=3,n=6,则s=3+33+333+3333+33333+333333。编程确定n和a的值，并计算s。 Private Sub Form_click() Dim s!, t!, i!, a%, n% a = Int(Rnd * 9 + 1) n = Int(Rnd * 6 + 5) t = 0: s = 0 Print Tab(9); "a="; a, "n="; n Print For i = 1 To n t = t * 10 + a s = s + t Print Tab(9); t Next i Print Print Tab(9); "s="; s End Sub 7、计算100~300之间所有能被3和7整除的数之和。 Private Sub Command1_Click() Dim s%, i% s = 0 For i = 100 To 300 If i Mod 3 = 0 Or i Mod 7 = 0 Then s = s + i End If Next i Print "s=" & s End Sub 8、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() Dim s1%, s2%, s3%, i% s1 = 0 s2 = 0 For i = 200 To 400 If i Mod 5 = 0 Or i Mod 7 = 0 Then s1 = s1 + i End If Next i For i = 200 To 400 If i Mod 5 = 0 And i Mod 7 = 0 Then s2 = s2 + i End If Next i s3 = s1 - s2 Print s3 End Sub 9找出被3、5、7除，余数均为1的最小的5个正整数。 Private Sub Command1_Click() Dim countN%, n% countN = 0 n = 1 Do n = n + 1 If n Mod 3 = 1 And n Mod 5 = 1 And n Mod 7 = 1 Then Print n countN = countN + 1 End If Loop Until countN = 5 End Sub 10、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 Form_Click() Dim a(6) As Integer, i%, t%, s!, max%, min%, imin%, imax% Randomize For i = 0 To 6 a(i) = InputBox("输入评委所打的分数") 或者 '也可以用随机数产生 'a(i) = Int(Rnd * 31 + 70) Next i For i = 0 To 6 Print a(i); Next i Print imax = 0: max = a(0) For i = 1 To 6 If a(i) >= max Then max = a(i): imax = i Next i t = a(0): a(0) = a(imax): a(imax) = t imin = 6: min = a(6) For i = 0 To 5 If a(i) <= min Then min = a(i): imin = i Next i t = a(6): a(6) = a(imin): a(imin) = t Print "除去最高分和最低分之后的分数" For i = 1 To 5 Print a(i); Next i For i = 1 To 5 s = s + a(i) Next i Print Print "该参赛者的平均得分为"; s / 5 End Sub 11、编程显示100~500之间所有的水仙花数之和。(水仙花数是3位数，其各位数之和等于该数本身) Private Sub Form_Click() Print "100~500之间所有的水仙花数为：" Dim x%, a%, b%, c% For x = 100 To 500 a = x Mod 10 b = (x Mod 100) \ 10 c = x \ 100 If x = a ^ 3 + b ^ 3 + c ^ 3 Then Print x Next x End Sub 12、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() Text1 = Int(Rnd * 900 + 100) End Sub Private Sub Command2_Click() Dim x%, x1%, x2%, x3% x = Val(Text1) x1 = x Mod 10 x2 = (x Mod 100) \ 10 x3 = x \ 100 Text2 = x1 * 100 + x2 * 10 + x3 End Sub 否构成三角13、从键盘输入三角形的三条边a,b,c的值，根据其数值，判断能形。 Private Sub Command1_Click() Dim a%, b%, c% a = Val(InputBox("inputa")) b = Val(InputBox("inputb")) c = Val(InputBox("inputc")) If a + b > c And b + c > a And a + c > b Then MsgBox ("能构成三角形") Else MsgBox ("不能构成三角形") End If End Sub 14、已知数组a()，编程删除a中第5个元素。数组a中的元素分别为{12，6，4，89，75，63，100，20，31}。 Private Sub Form_Click() Dim a(), i%, n% a = Array(12, 6, 4, 89, 75, 63, 100, 20, 31) n = UBound(a) For i = 0 To n Print a(i); Next i Print For i = 5 To n a(i - 1) = a(i) Next i n = n - 1 ReDim Preserve a(n)