1+1/2-1/4+1/8-...+1/n用vfp程序怎么做

1+1/2-1/4+1/8-...+1/n用vfp程序怎么做
1+1/2-1/4+1/8-...+1/n用vfp程序怎么做

1+1/2-1/4+1/8-...+1/n用vfp程序怎么做
**求1+1/2-1/4+1/8-...+1/n
CLEAR
input "请输入n的值：" to n &&n为2的倍数
IF MOD(n,2)0.or.n

input to n
j=1
s=1
i=2
do whil i<=n
s=s+j*(1/i)
j=-j
i=2*i
endf