Question

请写出下列程序的运行结果。（c++）

class Point
{ public:
Point()
{ X=Y=0;
cout<<"Default Constructor called."<<endl; }
Point(int xx,int yy)
{ X=xx; Y=yy;
cout<< "Constructor called."<<endl; }
~Point()
{ cout<<“Destructor called.”<<endl; }
private:
int X,Y; };
void main()
{ cout<<"Entering main..."<<endl;
Point A[2];
cout<<"Exiting main..."<<endl; }

Answer 1

运行Point A[2];，由于没有给初值，因此调用两次不带参数的构造函数，创建两个Point类对象，A[0]和A[1]

程序运行结束，依次析构两个类对象，调用两次析构函数

Answer 2

Entering main...

Default Constructor called.

Default Constructor called.
Entering main...

Destructor called.

Destructor called.