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

#include<stdio.h>int main(){int sign = 1;double deno = 2.0,sum = 1.0,term;while(deno<=100){sign = -sign;term = sign/deno;sum = sum + term;deno = deno + 1;}printf("%f\n",sum);return 0;}