抽象类管理内存

/* 内存管理包含类的继承 */

#include<iostream>
#include<vector>
using namespace std;

vector<char*>myv;

// 管理所有的内存地址 释放所有new 的个数
class base
{
public:
    static int num;
    void * operator new (size_t size)
    {
        num+=1;
        char *p = ::new char[size];
        myv.push_back(p);
        return p;
    }

    void * operator delete(void *p)
    {
        for(auto i : myv)
        {
            if(i==p)
            {
                num-=1;
                ::delete p;
            //    myv.erase(p);
                break;
            }
        }
    //    num-=1;
    //    ::delete p;
    }

    virtual void print() = 0;// 打印对象个数

};

int base::num = 0;

class X:public base
{
public:
    void print()
    {
        cout << this->num << endl;
    }
};


class Y:public base
{
public:
    void print()
    {
        cout << this->num << endl;
    }
};

void main()
{
    X *p1 = new X;
    X *p2 = new X;
    X *p3 = new X;
    
    delete p3;


    Y *p4 = new Y;

    Y *p5 = new Y;

    p2->print();

    cin.get();
}