如何在c ++中进行深层复制

#include<iostream>
#include <cstring>

class MyClass {
public:
    MyClass(const char* str) {
        m_str = new char[strlen(str) + 1];
        strcpy(m_str, str);
    }

    ~MyClass() {
        delete[] m_str;
    }

    MyClass(const MyClass& other) {
        m_str = new char[strlen(other.m_str) + 1];
        strcpy(m_str, other.m_str);
    }

    MyClass& operator=(const MyClass& other) {
        if (this != &other) {
            delete[] m_str;
            m_str = new char[strlen(other.m_str) + 1];
            strcpy(m_str, other.m_str);
        }
        return *this;
    }

    friend std::ostream& operator<<(std::ostream& os, const MyClass& obj) {
        os<< obj.m_str;
        return os;
    }

private:
    char* m_str;
};

int main() {
    MyClass obj1("Hello, world!");
    MyClass obj2 = obj1; // 深层复制

    std::cout << "obj1: "<< obj1<< std::endl;
    std::cout << "obj2: "<< obj2<< std::endl;

    return 0;
}

obj1: Hello, world!
obj2: Hello, world!