exe10.4.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)
	{  cout<<"Constructor in A."<<i<<endl;  }
    ~A()
	{  cout<<"Destructor in A.\n";  }
};
class B
{
  public:
	B(int i)
	{  cout<<"Constructor in B."<<i<<endl;  }
    ~B()
	{  cout<<"Destructor in B.\n";  }
};
class C
{
  public:
	C(int i)
	{  cout<<"Constructor in C."<<i<<endl;  }
    ~C()
	{  cout<<"Destructor in C.\n";  }
};
class D:public A,public B,public C
{
  public:
	D(int i,int j,int k,int l):A(i),B(j),C(k),a(l)
	{  cout<<"Constructor in D."<<l<<endl;  }
	~D()
	{  cout<<"Destructor in D.\n"; }
  private:
	A a;
};
void main()
{
	D d(3,4,5,6);
}