哪里出毛病了，运算结果不对啊
#include <stdio.h>
int main(){
//用while循环求 1-1/2+1/3-1/4+1/5-1/6+........-1/100 的和
double i=1 ,sum=0;
int n=1;
do{
if("n % 2 == 1")
sum =sum+1/i;
else
sum =sum-1/i;
n++;i++;
}
while(n <= 100);
printf("%lf\n",sum);
return 0;
}
