this指针用法

#include <iostream>

class Person
{
public:
   //解决名称冲突
   void age_set(int age)
   {
      //this指针指向 被调用的成员函数 所属的对象
      this->age = age;
   }

   Person &age_add(int age)
   {
      this->age += age;

      //返回对象本身
      return *this;
   }

   int age_get()
   {
      return this->age;
   }

private:
   int age;
};

int main()
{
   Person p;
   p.age_set(10);

   p.age_add(1).age_add(2).age_add(3);
   
   std::cout << "age " << p.age_get() << std::endl;

   return 0;
}

$ ./a.out     
age 16