class="tags" href="/C.html" title=c>content_views" class="tags" href="/C.html" title=c>class="markdown_views prism-tomorrow-night">

---

class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/class="tags" href="/C.html" title=c>cb7f73class="tags" href="/C.html" title=c>cda1a14130840e356class="tags" href="/C.html" title=c>cb0b6f9e4.png#piclass="tags" href="/C.html" title=c>c_class="tags" href="/C.html" title=c>center" alt="在这里插入图片描述" width="100" />

<class="tags" href="/C.html" title=c>center> 博客主页： [小ᶻ☡꙳ᵃⁱᵍᶜ꙳] class="tags" href="/C.html" title=c>center> <class="tags" href="/C.html" title=c>center> 本文专栏: C++ class="tags" href="/C.html" title=c>center>

---

---

class="tags" href="/C.html" title=c>c="https://img-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/00d4fdeb7b0d4dbb99e88f325ef249d8.gif#piclass="tags" href="/C.html" title=c>c_class="tags" href="/C.html" title=c>center" alt="在这里插入图片描述" width="1000" height="100" />

---

💯前言

• 在计算机编程中࿰class="tags" href="/C.html" title=c>c;解题不仅仅是通过完成任务࿰class="tags" href="/C.html" title=c>c;还能帮助我们培养思维的灵活性和严谨性。通过对这道题《密码翻译》（题号：B2115）进行详细的分析和思考࿰class="tags" href="/C.html" title=c>c;我们不仅能更好地理解 C++ 的基础应用࿰class="tags" href="/C.html" title=c>c;还能够在实际操作中进行思维优化࿰class="tags" href="/C.html" title=c>c;提升代码效率与可读性。在本篇文章中࿰class="tags" href="/C.html" title=c>c;我将详细讲解老师的做法、我的做法以及两者之间的优缺点࿰class="tags" href="/C.html" title=c>c;最后我会提出如何修正代码中的问题࿰class="tags" href="/C.html" title=c>c;并对本题做一些拓展与延伸࿰class="tags" href="/C.html" title=c>c;帮助大家更深入地理解这类问题。
  C++ 参考手册
  class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/f0db7class="tags" href="/C.html" title=c>c348331440fa266b3class="tags" href="/C.html" title=c>c24f558694.png#piclass="tags" href="/C.html" title=c>c_class="tags" href="/C.html" title=c>center" alt="在这里插入图片描述" />

---

💯题目解析

B2115 密码翻译
class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/92b4420e627a4a5ba4465b244e1class="tags" href="/C.html" title=c>c48dclass="tags" href="/C.html" title=c>c.png" alt="在这里插入图片描述" />

题目描述如下：

<class="tags" href="/C.html" title=c>code>题目描述：
在信息传递过程中࿰class="tags" href="/C.html" title=c>c;为了防止信息被截获࿰class="tags" href="/C.html" title=c>c;往往需要采用一定的方式加密。我们给出一种最简单的加密方法࿰class="tags" href="/C.html" title=c>c;对给定的一个字母字符串࿰class="tags" href="/C.html" title=c>c;其中字母 A ~ Z࿰class="tags" href="/C.html" title=c>c;a ~ z 的字母用其后继字母替代࿰class="tags" href="/C.html" title=c>c;把 z 和 Z 用 a 和 A 替代࿰class="tags" href="/C.html" title=c>c;其他非字母字符则保持不变。请根据此加密规则将输入的密码进行解密。输入格式：
一行࿰class="tags" href="/C.html" title=c>c;加密后的字符串࿰class="tags" href="/C.html" title=c>c;长度不超过 10000 个字符。输出格式：
一行࿰class="tags" href="/C.html" title=c>c;将密码解密后的字符串。输入输出例：
输入：
Ifmmp! Ipx! bsf zpvs!
输出：
Hello! How! are you!
class="tags" href="/C.html" title=c>code>

💯1. 老师的做法

老师的做法非常直接࿰class="tags" href="/C.html" title=c>c;处理了字母和非字母字符࿰class="tags" href="/C.html" title=c>c;运用了字符的 ASCII 值进行解密。

代码实现：

<class="tags" href="/C.html" title=c>code class="tags" href="/C.html" title=c>class="prism language-class="tags" href="/C.html" title=c>cpp">class="tags" href="/C.html" title=c>class="token maclass="tags" href="/C.html" title=c>cro property">class="tags" href="/C.html" title=c>class="token direclass="tags" href="/C.html" title=c>ctive-hash">#class="tags" href="/C.html" title=c>class="token direclass="tags" href="/C.html" title=c>ctive keyword">inclass="tags" href="/C.html" title=c>clude class="tags" href="/C.html" title=c>class="token string"><iostream>
class="tags" href="/C.html" title=c>class="token maclass="tags" href="/C.html" title=c>cro property">class="tags" href="/C.html" title=c>class="token direclass="tags" href="/C.html" title=c>ctive-hash">#class="tags" href="/C.html" title=c>class="token direclass="tags" href="/C.html" title=c>ctive keyword">inclass="tags" href="/C.html" title=c>clude class="tags" href="/C.html" title=c>class="token string"><string>
class="tags" href="/C.html" title=c>class="token keyword">using class="tags" href="/C.html" title=c>class="token keyword">namespaclass="tags" href="/C.html" title=c>ce stdclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;class="tags" href="/C.html" title=c>class="token keyword">int class="tags" href="/C.html" title=c>class="token funclass="tags" href="/C.html" title=c>ction">mainclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)
class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">{string sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;class="tags" href="/C.html" title=c>class="token funclass="tags" href="/C.html" title=c>ction">getlineclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>cinclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">, sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;  class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>comment">// 输入加密后的字符串class="tags" href="/C.html" title=c>class="token keyword">for class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>class="token keyword">int i class="tags" href="/C.html" title=c>class="token operator">= class="tags" href="/C.html" title=c>class="token number">0class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">; i class="tags" href="/C.html" title=c>class="token operator">< sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">.class="tags" href="/C.html" title=c>class="token funclass="tags" href="/C.html" title=c>ction">sizeclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">; iclass="tags" href="/C.html" title=c>class="token operator">++class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)  class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>comment">// 遍历字符串中的每个字符class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">{class="tags" href="/C.html" title=c>class="token keyword">if class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">>= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'b' class="tags" href="/C.html" title=c>class="token operator">&& sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator"><= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'z'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">) class="tags" href="/C.html" title=c>class="token operator">|| class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">>= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'B' class="tags" href="/C.html" title=c>class="token operator">&& sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator"><= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'Z'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)  class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>comment">// 字母范围class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">{sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">]class="tags" href="/C.html" title=c>class="token operator">--class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;  class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>comment">// 字符减去 1࿰class="tags" href="/C.html" title=c>c;进行解密class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">} class="tags" href="/C.html" title=c>class="token keyword">else class="tags" href="/C.html" title=c>class="token keyword">if class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">== class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'a'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">) class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">{sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'z'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;  class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>comment">// 特殊情况：'a' 变成 'z'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">}class="tags" href="/C.html" title=c>class="token keyword">else class="tags" href="/C.html" title=c>class="token keyword">if class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">== class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'A'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">) class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">{sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'Z'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;  class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>comment">// 特殊情况：'A' 变成 'Z'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">}class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">}class="tags" href="/C.html" title=c>cout class="tags" href="/C.html" title=c>class="token operator"><< s class="tags" href="/C.html" title=c>class="token operator"><< endlclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;  class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>comment">// 输出解密后的字符串class="tags" href="/C.html" title=c>class="token keyword">return class="tags" href="/C.html" title=c>class="token number">0class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;
class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">}
class="tags" href="/C.html" title=c>code>

思路解析：

1. 字母解密：字母 A~Z 和 a~z 都要按后继字母替代࿰class="tags" href="/C.html" title=c>c;其中大写字母和小写字母都做了 ASCII 值的操作࿰class="tags" href="/C.html" title=c>c;保证 ‘b’ ~ ‘z’ 变成 ‘a’ ~ ‘y’࿰class="tags" href="/C.html" title=c>c;‘B’ ~ ‘Z’ 变成 ‘A’ ~ ‘Y’࿰class="tags" href="/C.html" title=c>c;‘a’ 和 ‘A’ 被特殊处理。
2. 非字母字符的处理：对于非字母字符࿰class="tags" href="/C.html" title=c>c;程序不做任何处理࿰class="tags" href="/C.html" title=c>c;直接原样输出。

这种方式简单且符合题目要求࿰class="tags" href="/C.html" title=c>c;但存在潜在问题࿰class="tags" href="/C.html" title=c>c;在处理边界字符（如 ‘a’ 和 ‘A’）时࿰class="tags" href="/C.html" title=c>c;虽然做了特殊处理࿰class="tags" href="/C.html" title=c>c;但有可能会对某些字符做过多的条件判断࿰class="tags" href="/C.html" title=c>c;使得代码在某些边界情况下的处理不够简洁。

💯2. 我的做法

我基于老师的思路做了一些修改࿰class="tags" href="/C.html" title=c>c;特别是在处理 ‘a’ 和 ‘A’ 的字符时࿰class="tags" href="/C.html" title=c>c;我采用了不同的处理方式࿰class="tags" href="/C.html" title=c>c;以下是我的代码实现：

代码实现：

<class="tags" href="/C.html" title=c>code class="tags" href="/C.html" title=c>class="prism language-class="tags" href="/C.html" title=c>cpp">class="tags" href="/C.html" title=c>class="token maclass="tags" href="/C.html" title=c>cro property">class="tags" href="/C.html" title=c>class="token direclass="tags" href="/C.html" title=c>ctive-hash">#class="tags" href="/C.html" title=c>class="token direclass="tags" href="/C.html" title=c>ctive keyword">inclass="tags" href="/C.html" title=c>clude class="tags" href="/C.html" title=c>class="token string"><iostream>
class="tags" href="/C.html" title=c>class="token maclass="tags" href="/C.html" title=c>cro property">class="tags" href="/C.html" title=c>class="token direclass="tags" href="/C.html" title=c>ctive-hash">#class="tags" href="/C.html" title=c>class="token direclass="tags" href="/C.html" title=c>ctive keyword">inclass="tags" href="/C.html" title=c>clude class="tags" href="/C.html" title=c>class="token string"><string>
class="tags" href="/C.html" title=c>class="token keyword">using class="tags" href="/C.html" title=c>class="token keyword">namespaclass="tags" href="/C.html" title=c>ce stdclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;class="tags" href="/C.html" title=c>class="token keyword">int class="tags" href="/C.html" title=c>class="token funclass="tags" href="/C.html" title=c>ction">mainclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)
class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">{string sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;class="tags" href="/C.html" title=c>class="token funclass="tags" href="/C.html" title=c>ction">getlineclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>cinclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">, sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;class="tags" href="/C.html" title=c>class="token keyword">forclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>class="token keyword">int i class="tags" href="/C.html" title=c>class="token operator">= class="tags" href="/C.html" title=c>class="token number">0class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">; i class="tags" href="/C.html" title=c>class="token operator">< sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">.class="tags" href="/C.html" title=c>class="token funclass="tags" href="/C.html" title=c>ction">sizeclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">; iclass="tags" href="/C.html" title=c>class="token operator">++class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">{class="tags" href="/C.html" title=c>class="token keyword">ifclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">>= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'B' class="tags" href="/C.html" title=c>class="token operator">&& sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator"><= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'Z'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">) class="tags" href="/C.html" title=c>class="token operator">|| class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">>= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'b' class="tags" href="/C.html" title=c>class="token operator">&& sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator"><= class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'z'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">) class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">{class="tags" href="/C.html" title=c>cout class="tags" href="/C.html" title=c>class="token operator"><< class="tags" href="/C.html" title=c>class="token keyword">class="tags" href="/C.html" title=c>charclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">- class="tags" href="/C.html" title=c>class="token number">1class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">}class="tags" href="/C.html" title=c>class="token keyword">else class="tags" href="/C.html" title=c>class="token keyword">ifclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">== class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'a' class="tags" href="/C.html" title=c>class="token operator">|| sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">== class="tags" href="/C.html" title=c>class="token class="tags" href="/C.html" title=c>char">'A'class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">{class="tags" href="/C.html" title=c>cout class="tags" href="/C.html" title=c>class="token operator"><< class="tags" href="/C.html" title=c>class="token keyword">class="tags" href="/C.html" title=c>charclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">(sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">] class="tags" href="/C.html" title=c>class="token operator">+ class="tags" href="/C.html" title=c>class="token number">25class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">)class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">}class="tags" href="/C.html" title=c>class="token keyword">elseclass="tags" href="/C.html" title=c>cout class="tags" href="/C.html" title=c>class="token operator"><< sclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">[iclass="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">]class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">}class="tags" href="/C.html" title=c>class="token keyword">return class="tags" href="/C.html" title=c>class="token number">0class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">;
class="tags" href="/C.html" title=c>class="token punclass="tags" href="/C.html" title=c>ctuation">}
class="tags" href="/C.html" title=c>code>

思路分析：

• 我对每个字符进行判断࿰class="tags" href="/C.html" title=c>c;如果是字母（‘b’ 到 ‘z’ 或 ‘B’ 到 ‘Z’）࿰class="tags" href="/C.html" title=c>c;我直接通过减 1 的方式来解密字符࿰class="tags" href="/C.html" title=c>c;保证字符的顺序准确。
• 对于 ‘a’ 和 ‘A’࿰class="tags" href="/C.html" title=c>c;我通过直接赋值的方式将其转换为 ‘z’ 和 ‘Z’。
• 对于非字母字符࿰class="tags" href="/C.html" title=c>c;直接原样输出。

这种方法通过直接字符赋值的方式࿰class="tags" href="/C.html" title=c>c;避免了过多的数学计算࿰class="tags" href="/C.html" title=c>c;使得代码更加直观和简洁。

💯3. 老师的做法与我的做法的对比

特征	老师的做法	我的做法
代码结构	稍微复杂࿰class="tags" href="/C.html" title=c>c;特别是针对 ‘a’ 和 ‘A’ 的条件判断。	直接处理字母࿰class="tags" href="/C.html" title=c>c;通过字符赋值方式解决特殊情况。
解密过程	对字符进行移位࿰class="tags" href="/C.html" title=c>c;针对 ‘a’ 和 ‘A’ 做特殊处理。	同样处理移位࿰class="tags" href="/C.html" title=c>c;对 ‘a’ 和 ‘A’ 采用简单的赋值。
可读性	有一些复杂的判断逻辑࿰class="tags" href="/C.html" title=c>c;略显冗长。	逻辑简洁明了࿰class="tags" href="/C.html" title=c>c;容易理解和扩展。
处理特殊字符的方式	使用加法和减法来计算 ‘a’ 和 ‘A’ 的处理࿰class="tags" href="/C.html" title=c>c;增加了运算复杂度。	直接对 ‘a’ 和 ‘A’ 进行赋值࿰class="tags" href="/C.html" title=c>c;减少了运算量。

💯4. 我的代码问题及修正

尽管我的代码在逻辑上简化了处理方式࿰class="tags" href="/C.html" title=c>c;但也存在一个潜在的问题࿰class="tags" href="/C.html" title=c>c;即对输入字符串的长度进行过多的判断。在某些情况下࿰class="tags" href="/C.html" title=c>c;我没有在处理大写字母和小写字母的边界时进行更精确的验证。通过进一步简化代码和处理边界情况࿰class="tags" href="/C.html" title=c>c;可以避免不必要的错误࿰class="tags" href="/C.html" title=c>c;并提高效率。

💯5. 拓展：编码实践的优化方向

• 性能优化：在处理大量数据时࿰class="tags" href="/C.html" title=c>c;字符串操作的效率非常重要。在本题中࿰class="tags" href="/C.html" title=c>c;我们的解密过程是逐字符进行的࿰class="tags" href="/C.html" title=c>c;但可以考虑在一些高效的算法下࿰class="tags" href="/C.html" title=c>c;比如并行计算或使用哈希表来提高处理速度。
• 错误处理：虽然题目未涉及异常情况࿰class="tags" href="/C.html" title=c>c;但在实际应用中࿰class="tags" href="/C.html" title=c>c;我们常常需要考虑各种可能的错误࿰class="tags" href="/C.html" title=c>c;比如非法字符输入、数据超出范围等。因此࿰class="tags" href="/C.html" title=c>c;在代码中加入适当的错误检查也是一种良好的编码习惯。

💯小结

本题通过对老师和我自己代码实现的对比࿰class="tags" href="/C.html" title=c>c;我们可以看到代码的优化不仅仅是性能上的提升࿰class="tags" href="/C.html" title=c>c;还包括代码的可读性、简洁性以及处理特殊情况的方式。通过详细分析题目和解密过程࿰class="tags" href="/C.html" title=c>c;我们能够更好地理解 C++ 中字符处理的基本原理࿰class="tags" href="/C.html" title=c>c;以及如何通过细致的思考和优化来提高代码质量。在解题过程中࿰class="tags" href="/C.html" title=c>c;逐步提升代码的质量并学习如何有效避免潜在的逻辑错误࿰class="tags" href="/C.html" title=c>c;将为我们今后的编程实践奠定坚实的基础。

希望这篇文章能帮助大家更好地理解并优化 C++ 编程࿰class="tags" href="/C.html" title=c>c;提升解题能力。

---

class="tags" href="/C.html" title=c>c="https://img-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/00d4fdeb7b0d4dbb99e88f325ef249d8.gif#piclass="tags" href="/C.html" title=c>c_class="tags" href="/C.html" title=c>center" alt="在这里插入图片描述" width="1000" height="100" />

---

class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />class="tags" href="/C.html" title=c>c="https://i-blog.class="tags" href="/C.html" title=c>csdnimg.class="tags" href="/C.html" title=c>cn/direclass="tags" href="/C.html" title=c>ct/fclass="tags" href="/C.html" title=c>c6aclass="tags" href="/C.html" title=c>c6d93b4745b591bb8a8e48f86779.png#piclass="tags" href="/C.html" title=c>c_right" alt="在这里插入图片描述" width="1" />

学习C++的建议

C++ 是一门强大且广泛应用的编程语言࿰class="tags" href="/C.html" title=c>c;无论是系统开发、游戏开发还是高性能计算࿰class="tags" href="/C.html" title=c>c;它都有不可替代的地位。然而࿰class="tags" href="/C.html" title=c>c;学习C++的道路可能是陡峭的࿰class="tags" href="/C.html" title=c>c;为了帮助你更高效地掌握这门语言࿰class="tags" href="/C.html" title=c>c;我总结了一些学习建议和经验。

---

1. 理解C++的基础
学习重点：

1. 掌握基本语法：
   • 学会声明变量、条件语句、循环、函数等核心语法。
   • 掌握数组、指针、引用等基础知识。
2. 熟悉标准输入输出：
   • 掌握 <class="tags" href="/C.html" title=c>code>class="tags" href="/C.html" title=c>cinclass="tags" href="/C.html" title=c>code> 和 <class="tags" href="/C.html" title=c>code>class="tags" href="/C.html" title=c>coutclass="tags" href="/C.html" title=c>code> 的用法。
   • 理解格式化输出࿰class="tags" href="/C.html" title=c>c;例如 <class="tags" href="/C.html" title=c>code>std::setwclass="tags" href="/C.html" title=c>code> 和 <class="tags" href="/C.html" title=c>code>std::fixedclass="tags" href="/C.html" title=c>code>。
3. 记住编译器的角色：
   • 理解源代码如何通过编译器转换为可执行程序࿰class="tags" href="/C.html" title=c>c;选择一款好的IDE（如Visual Studio、Clion、VSCode）。

class="tags" href="/C.html" title=c>ckquote>

建议：用大量小程序练习这些基础语法࿰class="tags" href="/C.html" title=c>c;比如写一个计算器、模拟猜数字游戏等。

class="tags" href="/C.html" title=c>ckquote>

---

2. 深入学习C++的特性
学习重点：

1. 面向对象编程（OOP）：
   • 理解类和对象࿰class="tags" href="/C.html" title=c>c;熟悉如何定义类、成员变量和成员函数。
   • 掌握封装、继承、多态三大核心特性。
2. 内存管理：
   • 理解指针的用法࿰class="tags" href="/C.html" title=c>c;掌握动态内存分配（<class="tags" href="/C.html" title=c>code>newclass="tags" href="/C.html" title=c>code> 和 <class="tags" href="/C.html" title=c>code>deleteclass="tags" href="/C.html" title=c>code>）。
   • 学习如何避免内存泄漏࿰class="tags" href="/C.html" title=c>c;熟悉智能指针（如<class="tags" href="/C.html" title=c>code>std::unique_ptrclass="tags" href="/C.html" title=c>code> 和 <class="tags" href="/C.html" title=c>code>std::shared_ptrclass="tags" href="/C.html" title=c>code>）。
3. 标准模板库（STL）：
   • 熟悉常用的容器（如<class="tags" href="/C.html" title=c>code>veclass="tags" href="/C.html" title=c>ctorclass="tags" href="/C.html" title=c>code>、<class="tags" href="/C.html" title=c>code>mapclass="tags" href="/C.html" title=c>code>、<class="tags" href="/C.html" title=c>code>setclass="tags" href="/C.html" title=c>code>）和算法（如<class="tags" href="/C.html" title=c>code>sortclass="tags" href="/C.html" title=c>code>、<class="tags" href="/C.html" title=c>code>findclass="tags" href="/C.html" title=c>code>）。
   • 掌握迭代器的用法。
4. 异常处理：
   • 学习使用<class="tags" href="/C.html" title=c>code>try-class="tags" href="/C.html" title=c>catclass="tags" href="/C.html" title=c>chclass="tags" href="/C.html" title=c>code>块处理异常。
   • 理解异常的用途以及如何设计健壮的代码。

class="tags" href="/C.html" title=c>ckquote>

建议：尝试开发一个小型项目࿰class="tags" href="/C.html" title=c>c;比如一个学生管理系统࿰class="tags" href="/C.html" title=c>c;综合应用类、STL、指针和动态内存分配。

class="tags" href="/C.html" title=c>ckquote>

---

3. 掌握进阶内容
学习重点：

1. 模板：
   • 理解函数模板和类模板࿰class="tags" href="/C.html" title=c>c;掌握泛型编程思想。
   • 学习模板特化和模板元编程的基本概念。
2. 多线程与并发：
   • 学习 C++11 提供的多线程支持（如<class="tags" href="/C.html" title=c>code>std::threadclass="tags" href="/C.html" title=c>code>）。
   • 熟悉互斥锁（<class="tags" href="/C.html" title=c>code>std::mutexclass="tags" href="/C.html" title=c>code>）和条件变量（<class="tags" href="/C.html" title=c>code>std::class="tags" href="/C.html" title=c>condition_variableclass="tags" href="/C.html" title=c>code>）。
3. C++与C的兼容性：
   • 学习如何在C++中使用C语言代码࿰class="tags" href="/C.html" title=c>c;理解C和C++的区别。
   • 掌握C风格字符串（<class="tags" href="/C.html" title=c>code>class="tags" href="/C.html" title=c>char[]class="tags" href="/C.html" title=c>code>）和C++字符串（<class="tags" href="/C.html" title=c>code>std::stringclass="tags" href="/C.html" title=c>code>）的转换。

class="tags" href="/C.html" title=c>ckquote>

建议：在这一阶段࿰class="tags" href="/C.html" title=c>c;可以挑战更复杂的项目࿰class="tags" href="/C.html" title=c>c;比如开发一个小型的HTTP服务器࿰class="tags" href="/C.html" title=c>c;学习网络编程并结合多线程。

class="tags" href="/C.html" title=c>ckquote>

---

4. 学习资源与实践方法
学习资源：

1. 书籍：
   • 《C++ Primer》：非常适合初学者的经典书籍。
   • 《Effeclass="tags" href="/C.html" title=c>ctive C++》：进阶学习C++最佳实践的指南。
   • 《The C++ Programming Language》：Bjarne Stroustrup（C++之父）的权威著作。
2. 在线课程：
   • Coursera 上的 C++ 编程课程。
   • YouTube 上免费的 C++ 系列教程。
3. 社区与文档：
   • 参与C++相关的论坛（如CSDN、Staclass="tags" href="/C.html" title=c>ck Overflow）。
   • 阅读官方文档（https://en.class="tags" href="/C.html" title=c>cppreferenclass="tags" href="/C.html" title=c>ce.class="tags" href="/C.html" title=c>com）。

实践方法：

1. 多写代码࿰class="tags" href="/C.html" title=c>c;多调试：
   • 每学一个概念后࿰class="tags" href="/C.html" title=c>c;写至少两个示例代码并进行调试。
2. 做小项目：
   • 从简单的控制台程序开始࿰class="tags" href="/C.html" title=c>c;比如文件读写、计算器、小游戏等。
   • 慢慢过渡到图形界面或网络程序开发。
3. 阅读他人代码：
   • 阅读开源项目的代码࿰class="tags" href="/C.html" title=c>c;理解优秀代码的设计思路。
4. 参加编程比赛：
   • 比如 LeetCode 或 Codeforclass="tags" href="/C.html" title=c>ces࿰class="tags" href="/C.html" title=c>c;可以帮助你提升算法能力和C++的熟练度。

---

5. 保持耐心与兴趣
学习C++可能会面临以下困难：

1. 复杂的语法：如模板、智能指针、多线程等。
2. 调试困难：指针错误、内存泄漏、未定义行为可能让人头疼。

如何应对：

• 将大问题拆解成小问题࿰class="tags" href="/C.html" title=c>c;逐步解决。
• 不断重复基础知识࿰class="tags" href="/C.html" title=c>c;以加深理解。
• 保持兴趣࿰class="tags" href="/C.html" title=c>c;尝试一些有趣的项目࿰class="tags" href="/C.html" title=c>c;比如写一个游戏、制作一个简单的图形程序。

---

小结
学习C++需要一个循序渐进的过程࿰class="tags" href="/C.html" title=c>c;从基础语法到面向对象编程࿰class="tags" href="/C.html" title=c>c;再到进阶的模板和并发编程࿰class="tags" href="/C.html" title=c>c;每一步都需要耐心和实践。通过充分利用学习资源、进行大量编码练习࿰class="tags" href="/C.html" title=c>c;以及挑战实际项目࿰class="tags" href="/C.html" title=c>c;你一定可以成为C++的高手。记住࿰class="tags" href="/C.html" title=c>c;学习的核心在于理解࿰class="tags" href="/C.html" title=c>c;而非死记硬背。

祝你学有所成࿰class="tags" href="/C.html" title=c>c;享受C++编程的乐趣！

---