当c_str = "smth“+c_str时，如何重载c++中的运算符+

#include <cstring>

class MyString {
private:
    char* str;

public:
    MyString(const char* s) {
        str = new char[std::strlen(s) + 1];
        std::strcpy(str, s);
    }

    ~MyString() {
        delete[] str;
    }

    // 重载运算符+
    MyString operator+(const MyString& other) const {
        char* newStr = new char[std::strlen(str) + std::strlen(other.str) + 1];
        std::strcpy(newStr, str);
        std::strcat(newStr, other.str);
        MyString result(newStr);
        delete[] newStr;
        return result;
    }

    // 获取字符串
    const char* getStr() const {
        return str;
    }
};

#include <iostream>

int main() {
    MyString str1("Hello");
    MyString str2("World");
    MyString result = str1 + str2;
    std::cout << result.getStr() << std::endl;

    return 0;
}