浅析C++浅拷贝与深拷贝的联系和区别

#include <iOStream>
using namespace std;
class student
{
    private:
        string name;       //--------------//
        int age;
    public:
        student()    //出现带参构造，需要默认构造
        {
            cout << "默认构造" << endl;
        }
        student(string m_name, int m_age)
        {
            cout << "name:" << m_name << endl << "age:" << m_age << endl;
            cout << "带参构造" << endl;
        }
        ~student()
        {
            cout << "析构函数" << endl;
        }
};
void test1()
{
    student s1 = student("tom", 12);
    student s2 = s1;        //利用栈进行默认复制
}
int main()
{
    test1();        //引用函数.
    return 0;
}

#include <iostream>
using namespace std;
class student
{
    private:
        string name;
        //int age;
        int *age;    //定义指针age
    public:
        student()
        {
            cout << "默认构造" << endl;
        }
#if 0      //------------------------------------------
        student(string m_name, int m_age)
        {
            cout << "name:" << m_name << endl << "age:" << m_age << endl;
            cout << "带参构造" << endl;
        }
#endif    //-------------------------------------------
        student(int m_age)
        {
            this->age = new int(m_age);
            cout << "开辟空间" << endl;
        }
        ~student()
        {   
            delete age;    //开辟使用完成，在析构进行释放age操作
            cout << "析构函数" << endl;
        }
        int get_age()
        {
            return *age;
        }
};
void test1()
{
    //student s1 = student("tom", 12);
    //student s2 = s1;
    student s1(10);    //定义年龄为10，进行复制
    student s2 = s1;
}
int main()
{
    test1();       //调用函数
    return 0;
}

#include <iostream>
using namespace std;
class student
{
    private:
        string name;
        //int age;
        int *age;
    public:
        student()
        {
            cout << "默认构造" << endl;
        }
#if 0   //--------------------------------------
        student(string m_name, int m_age)
        {
            cout << "name:" << m_name << endl << "age:" << m_age << endl;
            cout << "带参构造" << endl;
        }
#endif  //--------------------------------------
        student(int m_age)
        {
            this->age = new int(m_age);
            cout << "开辟空间" << endl;
        }
        //-----------深浅拷贝-------------------
        //student(const student &s)
        //{
        //    this->age = s.age;
        //    cout << "浅拷贝" << endl;
        //
        //}
        student(const student &s)
        {
            this->age = new int(*s.age); //创建一片新的空间进行储存
            cout << "深拷贝" << endl;
        }
        //--------------------------------------
        ~student()
        {   
            delete age;
            cout << "析构函数" << endl;
        }
        int get_age()
        {
            return *age;
        }
};
void test1()
{
    //student s1 = student("tom", 12);
    //student s2 = s1;
    student s1(10);
    student s2 = s1;
}
int main()
{
    test1();
    return 0;
}