简单动态分配内存1

#include <iostream>using namespace std;class A{public:    A()    {        cout<<"A";    }    ~A()    {        cout<<"A";    }};class B{    A *p;public:    B()    {        cout<<"B";        p=new A();    }    ~B()    {        cout<<"B";        delete p;    }};int main(){    B obj;    return 0;}