n =input("输入一个数：")
n =int(n)
sum =1/n
x =2
y =1
while x < n:
if n %2 ==0:
sum = sum + (1/x)
x+=1
print(sum)
break
elif n %2 !=0:
sum = sum + (1/y)
y +=1
print(sum)
break
n =input("输入一个数：")
n =int(n)
sum =1/n
x =2
y =1
while x < n:
if n %2 ==0:
sum = sum + (1/x)
x+=1
print(sum)
break
elif n %2 !=0:
sum = sum + (1/y)
y +=1
print(sum)
break
本文标题：2018-07-04
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