赋值运算符重载

约 42 个字 41 行代码 预计阅读时间 1 分钟

运算符重载的方法有友元或者成员函数两种途径，但是赋值运算符只能使用成员函数的方法来实现

#include <iostream>
using namespace std;
class Person{
public:
  Person(int age){
        this->age = new int (age);
    }
    Person& operator= (Person &p){
        if (age != nullptr){
            delete age;
            age = nullptr;
        }
        age = new int (*p.age);
        return *this;
    }
    ~Person(){
      if (age != nullptr){
          delete age;
          age = nullptr;
      }
    }
    int * getAge(){
      return this->age;
  }
private:
    int * age;

};

void test1(){
    Person p1(15);
    Person p2(20);
    Person p3(30);
    p3 = p2 = p1;
    cout << *p3.getAge() << endl;
}

int main(){
    test1();
    return 0;
}

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