（实验3-3） 构造函数的调用

3-3 构造函数的调用(高级)

Problem Description

Input

Output

Example Input

无

Example Output

----begin main---
constructing an object of A
constructing an object of A
Destructing an object of A
*******
constructing an object of A
constructing an object of A
----end main---
Destructing an object of A
Destructing an object of A
Destructing an object of A

#include <iostream>
using namespace std;


class A
{
public:
A()
{
cout<<"constructing an object of A"<<endl;
}
~A()
{
cout<<"Destructing an object of A"<<endl;
}
};


int main()
{
cout<<"----begin main---"<<endl;
class A *p;
p=new class A;


class A a;
delete p;


cout<<"*******"<<endl;
class A b;
class A c;
cout<<"----end main---"<<endl;
return 0;
}