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下列程序的功能是求算式：1-1/2+1/3-1/4+....前30项之和。请在空白处填入适当的语句，使程序可以完成指定的功能。 Private Sub Command1_Click（) Dim i as Integer, s As Single, f As Integer s = 0 : f = 1 For i = 1 To 30 s = s + f/i f =（） Next i Debug.Print “1-1/2+1/3-1/4+…=”; s End Sub
参考答案和解析
根据题意， s=s+ 1 n n=n+2 ∴数列为 { 1 2n } 又∵K≤10 ∴计算的是求数列 { 1 2n } 的前10项和（n∈N * ） 故答案为：B
更多 “下列程序的功能是求算式：1-1/2+1/3-1/4+....前30项之和。请在空白处填入适当的语句，使程序可以完成指定的功能。 Private Sub Command1_Click（) Dim i as Integer, s As Single, f As Integer s = 0 : f = 1 For i = 1 To 30 s = s + f/i f =（） Next i Debug.Print “1-1/2+1/3-1/4+…=”; s End Sub” 相关考题
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设有如下程序：Private Sub Form. Click（ ）Dim s As Long，f As LongDim n As Integer，i As Integerf=1n=4For i=1 To nf=f*is=s+fNext iPrint sEnd Sub程序运行后，单击窗体，输出结果是（ ）。A.32B.33C.34D.35
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下列程序运行后的输出结果是______。Private Sub f(k，s)s=1For j=1 To ks=s*jNextEnd SubPrivate Sub Command1_Click()Sum=0For i=1 To 3Call f(i，s)Sum=Sum+sNextPrint SumEnd Sub
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试题11下列程序的功能是求算式：1-1/2+1/3-1/4+……前30项之和。请在空白处填入适当的语句，使程序可以完成指定的功能。Private Sub Command0_Click()Dim i As Single ， s As Single，f As Singles=0 ：f=1For i= 1 To 30s=s+f / if=___【11】__Next iDebug.Print “1-1/2+1/3-1/4+……=”；sEnd Sub
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