问个简单的问题

s=1-1/2+1/3-1/4+1/5……1/i(1/i<1E-6) --------------------编程问答-------------------- 没人啊......................... --------------------编程问答-------------------- 求后续.............. --------------------编程问答-------------------- s=1-1/2+1/3-1/4+1/5……1/i(1/i<1E-6)

int i = 1;
int sng = 1;
double s = 0;
while ((double)1 / (double)i < 0.000001)
{
    s = s + (double)sng * ((double)1 / (double)i);
    sng = 0 - sng;
    i++;
} --------------------编程问答--------------------

//与其强制转换不如直接定义成double

double i=1;

double sng=1;

double s=0;

while(1/i<1e-6){

    s+=sng*1/i;

    sng=-sng;

    i++;

}

补充：Java ,  Eclipse