用vb么?
dim i as integer
a = 0
for i = 1 to 100
a = a + ((-1)^(n+1))/n
next i
print a(或label1.caption = a[你用那个label,就写label几,不一定是label1])
用vb么?
dim i as integer
a = 0
for i = 1 to 100
a = a + ((-1)^(n+1))/n
next i
print a(或label1.caption = a[你用那个label,就写label几,不一定是label1])