今天主播来讲一下深浅拷贝，是面试的一个坑

（1）浅拷贝-简单的赋值拷贝操作

#include<bits/stdc++.h>
using namespace std;
class person{
	public:
		person(int age,int height){
			m_age=age;
			m_height=new int(height);
		}
		
		~person(){
			if(m_height!=NULL){
				delete m_height;
				m_height=NULL;
			}
		}
		int m_age;
		int *m_height;
};
void test01(){
	person p1(18,160);
	person p2(p1);
	cout<<p1.m_age<<" "<<*p1.m_height<<endl;
	cout<<p2.m_age<<" "<<*p2.m_height<<endl;
}
int main()
{
	test01();
}

p1和p2同时指向堆区,在函数执行结束之后执行析构函数的释放堆区内存，p1和p2连续释放两次导致代码错误

（2）深拷贝-在堆区重新申请空间，进行拷贝操作

自己实现拷贝构造函数，解决浅拷贝带来的问题

#include<bits/stdc++.h>
using namespace std;
class person{
	public:
		person(int age,int height){
			m_age=age;
			m_height=new int(height);
		}
		person(const person &p){
			m_age=p.m_age;
			m_height=new int(*p.m_height);
		}
		~person(){
			if(m_height!=NULL){
				delete m_height;
				m_height=NULL;
			}
		}
		int m_age;
		int *m_height;
};
void test01(){
	person p1(18,160);
	person p2(p1);
	cout<<p1.m_age<<" "<<*p1.m_height<<endl;
	cout<<p2.m_age<<" "<<*p2.m_height<<endl;
}
int main()
{
	test01();
}

自己在拷贝函数中重新申请堆内存，实现深拷贝