Question

实验五，用vb怎么编程

Answer 1

先获取用户的第一个数值，赋给n，然后套用题目的计算公式for循环n次，得出结果，再输出，完毕。

追问

不懂，能不能打编程啊

Answer 2

dim i as integer
dim j as integer
dim s as single
dim s1 as single
dim n as integer
s=0

for i =1 to n
s1=1
for j=1 to i
s1=s1*j
next j
if i mod 2 =0 then
s=s-1/s1
else
s=s+1/s1
endif
next i
s=format(s,".000000")

Answer 3