求助

剑指 Offer 15. 二进制中1的个数

编写一个函数，输入是一个无符号整数（以二进制串的形式），返回其二进制表达式中数字位数为 ‘1’ 的个数

我的第一版代码：

Help Wanted

Number of 1 Bits

Write a function that takes an unsigned integer (in binary string form) and returns the number of ‘1’ bits in its binary representation.

My first version of the code:

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class Solution {
public:
    int hammingWeight(uint32_t n) {
        if(n == 1) return 1;
        if(n == 0) return 0;
        return n&1 + hammingWeight(n>>1);
    }
};

这个我看起来问题不大啊，边界条件设置好，n&1 计算最低位是不是 1 ，再加上递归调用 n 的右移1 位。

This looks fine to me. The base cases are set up, n&1 checks whether the lowest bit is 1, plus the recursive call on n shifted right by 1 bit.

摄影师：广元

Photographer: Guangyuan

前言

在闲暇时间浏览 GitHub 时，在推荐页面发现了这样一个项目，项目的简介里写着：

An index & manager of Onedrive based on serverless. Can be deployed to Heroku/Glitch/Vercel/SCF/FG/FC/CFC/PHP web hosting/VPS.

凭借我长期的白嫖经验，以及大学英语 5.8 级的水平，迅速捕捉到几个熟悉的关键词：manager of Onedrive，Heroku，Vercel。关于 Heroku 我曾经写过一篇 Heroku 搭建 V2ray 教程 在 Bing 的搜索权重相当之高，高到我自己都属实没想到啊！

Preface

While browsing GitHub in my spare time, I came across this project on the recommendations page. Its description read:

An index & manager of Onedrive based on serverless. Can be deployed to Heroku/Glitch/Vercel/SCF/FG/FC/CFC/PHP web hosting/VPS.

Relying on my long experience with freeloading and my college English level of 5.8, I quickly caught a few familiar keywords: manager of Onedrive, Heroku, Vercel. I once wrote a post about Heroku — Heroku 搭建 V2ray 教程 (Heroku V2ray Tutorial) — which ranks remarkably high on Bing, so high that even I didn’t expect it!

机房预约系统需求

系统简介

学校现有几个规格不同的机房，由于使用时经常出现"撞车"现象,现开发一套机房预约系统，解决这一问题。

Computer Room Reservation System Requirements

System Introduction

The school has several computer rooms of different specifications. Since “collision” often occurs when using them, a computer room reservation system is now developed to solve this problem.