C++类对象构造顺序

#include<iostream>
#include<string>
using namespace std;
class Phone {
private:
  string m_PName;
public:
  Phone(string pname) {
    m_PName = pname;
    cout << "手机构造函数被调用" << endl;
  }
  string getname() {
    return m_PName;
  }
  ~Phone() {
    cout << "手机析构函数被调用" << endl;
  }
};
class watch {
public:
  watch() {
    cout << "手表构造函数被调用了" << endl;
  }
  ~watch() {
    cout << "手表析构函数被调用了" << endl;
  }
};
class Person {
private:
  string m_Name;
  Phone m_phone;
  watch w;
public:
  Person(string name,string pname): m_Name(name), m_phone(pname){
    cout << "人构造函数被调用" << endl;
  }
  string getname() {
    return m_Name;
  }
  string getpname() {
    return m_phone.getname();
  }
  ~Person() {
    cout << "人析构函数被调用" << endl;
  }
};
int main() {
  Person p("杨强", "小米mix3");
  cout << p.getname() << "的手机型号是" << p.getpname() << endl;
}
//当其他类对象作为本类成员时,构造时候先构造类对象,在构造自身