如何正确地将参数从结构传递到函数？

struct Person {
    string name;
    int age;
};

void printPerson(Person p) {
    cout << "Name: " << p.name << ", Age: " << p.age << endl;
}

int main() {
    Person p1 = {"John", 25};
    printPerson(p1);
    return 0;
}

struct Person {
    string name;
    int age;
};

void updateAge(Person& p, int newAge) {
    p.age = newAge;
}

int main() {
    Person p1 = {"John", 25};
    updateAge(p1, 30);
    cout << "Updated Age: " << p1.age << endl;
    return 0;
}

struct Person {
    string name;
    int age;
};

void updateName(Person* p, string newName) {
    p->name = newName;
}

int main() {
    Person p1 = {"John", 25};
    updateName(&p1, "Mike");
    cout << "Updated Name: " << p1.name << endl;
    return 0;
}