#include <cstring>
#include <iostream>

using namespace std;
class Person {
public:
  typedef enum { BOY = 0, GIRL } SexType;
  Person(char *n, int a, SexType s) {
    name = new char[strlen(n) + 1];
    strcpy(name, n);
    age = a;
    sex = s;
  }
  int get_age() const { return this->age; }
  Person &add_age(int a) {
    age += a;
    return *this;
  }
  ~Person() { delete[] name; }

private:
  char *name;
  int age;
  SexType sex;
};

int main() {
  Person p("zhangsan", 20, Person::BOY);
  cout << p.get_age() << endl;

  return 0;
}