#?C++類的深拷貝與淺拷貝

堆區(qū)的內(nèi)存重復(fù)釋放

改進，拷貝構(gòu)造都開辟新的內(nèi)存

```

#include<iostream>

using namespace std;

class Person

{

????public:

????Person()

????{

????????cout << "Person默認構(gòu)造函數(shù)調(diào)用" << endl;

????}

????Person(int age, int height)

????{

????????cout << "Person有參構(gòu)造函數(shù)調(diào)用" << endl;

????????m_Age = age;

????????m_Height = new int(height);

????}

Person(const Person & p)

{

????????cout << "Person拷貝構(gòu)造函數(shù)調(diào)用" << endl;

????? ? //m_Height = p.m_Height; 編譯器默認實現(xiàn)這個代碼

????????//深拷貝操作

????????m_Height = new int(*p.m_Height);//*p.m_Height 解引用，得到參數(shù)存儲的內(nèi)存地址

????}

//淺拷貝帶來堆區(qū)的重復(fù)釋放

~Person()

{ //析構(gòu)代碼, 將堆區(qū)開辟數(shù)據(jù)做釋放操作

????if (m_Height != NULL)

{

delete m_Height;

//放置野指針的出現(xiàn)，先置空

m_Height = NULL;

}

????cout << "Person析構(gòu)函數(shù)調(diào)用" << endl;

}

????int m_Age;

????int *m_Height; //身高

};

void test01()

{

????Person p1(18, 160);

????cout << "p1的年齡為: " << p1.m_Age << "身高為: " << *p1.m_Height << endl;

????Person p2(p1);

????cout << "p2的年齡為: " << p1.m_Age << "2身高為: " << *p1.m_Height << endl;

}

int main()

{

????test01();

????system("pause");

????return 0;

}

```