26、C++ 字符串操作全解析

C++ 字符串操作全解析

1. 字符串输入与复制

在 C++ 中，字符串操作是常见且重要的任务。首先来看字符串的输入，程序会提示用户输入字符串，每行以 Enter 键结束，直到输入 $ 为止。例如：

Enter a string:
Ask me no more where Jove bestows
When June is past, the fading rose;
For in your beauty’s orient deep
These flowers, as in their causes, sleep.
$
You entered:
Ask me no more where Jove bestows
When June is past, the fading rose;
For in your beauty’s orient deep
These flowers, as in their causes, sleep.

接下来探讨字符串的复制，有两种方式：

1.1 手动复制字符串

手动复制字符串能让我们深入理解字符串的本质，通过逐字符处理来完成复制。以下是示例代码：

// strcopy1.cpp
// copies a string using a for loop
#include <iostream>
#include <cstring>                     //for strlen()