######作业中遇到求和问题始终得不出精确值
答案总是1
int i = 1;
int a=1;
int c;
int b;
while (a <= 100)
{
c = 0;
for (b = 1; b <=a; b++)
{
c = c+1;
}
i = -i;
c = c * i;
sum = sum +(1 / c);
a++;
}
printf("%f\n", sum);