如何编这一题:计算S=1+ 1/2+1/4+1/7+1/11+1/16+1/22+1/29.,当第i项的值

第一种方式：
Private Sub Command1_Click()
Dim a As Integer
Dim i As Integer
Dim S As Double
a = 1
i = 1
S = 0
Do While (1 / a) > (1 / 10000)
a = a + (i - 1)
S = S + (1 / a)
i = i + 1
If i = 141 Then Print i; S
Loop
Print S
Print i
End Sub
第二种方式
Dim a As Integer
Dim i As Integer
Dim S As Double
a = 1
i = 1
S = 0
Do
a = a + (i - 1)
S = S + (1 / a)
i = i + 1
If i = 141 Then Print i; S
Loop While (1 / a) > (1 / 10000)
Print S
Print i
注：i为项数、S为总合.如果把while改为until则符号“>”改为“.
对了,第141项为2.35936…虽然和你说的结果有点误差,但是,这是在计算机合理的范围内,因为保存数据的需要,单精度（single）和双精度（double）在实际存储数据中都会对小数位数多的产生一定误差.