3-this指针的用途

#include<bits/stdc++.h>
using namespace std;
//1、解决名称冲突问题
//2、 返回对象本身用*this
class Person
{
public:
  Person(int age)
  {
    //1、当形参和成员变量同名时，可用this指针来区分
    this->age = age;
  }
  Person& PersonAddPerson(Person p)
  {
    this->age += p.age;
    //返回对象本身
    return *this;
  }
  int age;
};
void test01()
{
  Person p1(10);
  cout << "p1.age = " << p1.age << endl;
  Person p2(10);
  cout << "p2.age = " << p2.age << endl;
  p2.PersonAddPerson(p1).PersonAddPerson(p1).PersonAddPerson(p1);
  cout << "p2.age = " << p2.age << endl;
}
int main()
{
  test01();
  system("pause");
  return 0;
}