计算1-1/2+1/3-1/4+1/5 …… + 1/99 - 1/100的值

<span style="font-size:32px;">#include<stdio.h>
int main()
{
	double i;
	int term=1;
	double sign=0.0;
	double value=0.0;
	for(i=1;i<=100;i++)
	{
		sign=term/i;
		value=sign+value;
		term=term*(-1);
	}
	printf("%f\n",value);
	return 0;
}</span>