#include<stdio.h>
int main()
{
int sign=1;
double a=2.0, sum=1.0, b;
while (a <= 100)
{
sign = -sign;
b = sign / a;
sum = sum + b;
a++;
}
printf("sum=%d\n", sum);
system("pause");
return 0;
}本文出自 “无以伦比的暖阳” 博客，请务必保留此出处http://10797127.blog.51cto.com/10787127/1705832
原文：http://10797127.blog.51cto.com/10787127/1705832