exe10.3.cpp

这是C++的一部分练习程序!对初学者有一定的帮助作用。

#include  <iostream.h>
class A
{
  public:
	A(int i):a(i)
	{  cout<<"A:constructorcalled.\n";  }
	~A()
	{  cout<<"A:Destructor called.\n";  } 
	void Print()
	{  cout<<a<<endl;  }
    int Geta()
	{  return a;  }
  private:
	int a;
};
class B:public A
{
  public:
	B(int i=0,int j=0):A(i),a(j),b(i+j)
	{   cout<<"B:Constructor called.\n";  }
	~B()
	{  cout<<"B:Destructor called.\n";  } 
    void Print()
	{
		A::Print();
		cout<<b<<','<<a.Geta()<<endl;
	}
  private:
	int b;
	A a;
};
void main()
{
	B b1(8),b2(12,15);
	b1.Print();
	b2.Print();
}