题解 | #牛牛学数列3#
牛牛学数列3
http://www.nowcoder.com/practice/f65c726d081c4160a9356eabf0dc21d9
#include <stdio.h> int main(){ int n; double sum=0; scanf("%d",&n); for(int i=1;i<=n;i++){ if(i%2==0){ sum-=1.0/i; continue; } sum+=1.0/i; } printf("%.3lf",sum); return 0; }
查看17道真题和解析