如何在c++中移动字符？

#include <iostream>
#include <utility>

class MyString {
public:
    MyString() : data(nullptr) {}
    
    // 移动构造函数
    MyString(MyString&& other) noexcept {
        data = other.data;
        other.data = nullptr;
    }
    
    // 移动赋值运算符
    MyString& operator=(MyString&& other) noexcept {
        if (this != &other) {
            delete data;
            data = other.data;
            other.data = nullptr;
        }
        return *this;
    }
    
    // 析构函数
    ~MyString() {
        delete data;
    }
    
    // 设置字符数据
    void setData(const char* str) {
        delete data;
        data = new char[strlen(str) + 1];
        strcpy(data, str);
    }
    
    // 获取字符数据
    const char* getData() const {
        return data;
    }
    
private:
    char* data;
};

int main() {
    MyString str1;
    str1.setData("Hello");
    
    MyString str2 = std::move(str1);  // 使用移动构造函数移动字符
    
    std::cout << "str1: " << str1.getData() << std::endl;  // 输出为空，资源已被移动
    std::cout << "str2: " << str2.getData() << std::endl;  // 输出为"Hello"
    
    MyString str3;
    str3 = std::move(str2);  // 使用移动赋值运算符移动字符
    
    std::cout << "str2: " << str2.getData() << std::endl;  // 输出为空，资源已被移动
    std::cout << "str3: " << str3.getData() << std::endl;  // 输出为"Hello"
    
    return 0;
}