变量调用其他变量销毁自己

#include <iostream>
using namespace std;

class Child;
class Father
{
public:
    void DelChild(Child *p);
};
class Child
{
public:
    void fun()
    {
        m_p->DelChild(this);
         char *ch=this->getName();
         cout<<ch<<endl;
    };
    char* getName(){return "111222";};
    Child(Father *p)
    {
        m_p=p;
        strcpy(m_ch,"111222");
    }
    ~Child()
    {
        cout<<"destory"<<endl;
    }
    Father* m_p;
    char m_ch[10];
};
void Father::DelChild(Child *p)
{
    delete p;
}
int main()
{
    Father* pf=new Father;
    Child* child=new Child(pf);
    child->fun();
    return 0;
}

结果：

destory
111222
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#include <iostream>
using namespace std;

class Child;
class Father
{
public:
    void DelChild(Child *p);
};
class Child
{
public:
    void fun()
    {
        m_p->DelChild(this);
         char *ch=this->getName();
         cout<<ch<<endl;
    };
    char* getName(){return m_ch;};
    Child(Father *p)
    {
        m_p=p;
        strcpy(m_ch,"111222");
    }
    ~Child()
    {
        cout<<"destory"<<endl;
    }
    Father* m_p;
    char m_ch[10];
};
void Father::DelChild(Child *p)
{
    delete p;
}
int main()
{
    Father* pf=new Father;
    Child* child=new Child(pf);
    child->fun();
    return 0;
}

结果：

destory
葺葺葺葺葺葺葺葺
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个人理解：

 虽然变量已经销毁，但是代码区还存在