第四周项目零：程序阅读——构造函数和析构函数（1）

#include <iostream>
using namespace std;
class A
{
    int a , b ;
public :
    A( )
    {
        a=b=0;
        cout <<"a="<<a<<","<<"b="<<b<<endl;
    }
    A(int aa, int bb): a(aa),b(bb)
    {
        cout <<"a="<<a<<","<<"b="<<b<<endl;
    }
    ~A( )
    {
        cout<<"Destructor "<<a<<" "<<b<<endl;
    }
};
int main()
{
    A x, y(2, 3);
    return 0;
}