题解 | 牛牛学数列3
牛牛学数列3
https://www.nowcoder.com/practice/f65c726d081c4160a9356eabf0dc21d9
#include <stdio.h>
int main()
{
int n;
scanf("%d",&n);
int i;
float sum = 0.0;
float denominator = 0.0;
int flag = 1;
for(i = 1; i <= n; i++)
{
denominator += flag * (2.0 * i - 1);
sum += 1 / denominator;
flag = -flag;
}
printf("%.3f",sum);
return 0;
}
查看2道真题和解析