10.8.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()
	{  a=0;  }
	A(int i)
	{  a=i;  }
	~A()
	{  cout<<"In A.\n";  }
	void Print()
	{  cout<<a<<',';  }
  private:
	int a;
};
class B:public A
{
  public:
	B()
	{  b1=b2=0;  }
	B(int i)
	{  b1=0;b2=i;  }
	B(int i,int j,int k):A(i),b1(j),b2(k)
	{  }
	~B()
	{  cout<<"In B.\n";  }
	void Print()
	{
		A::Print();
		cout<<b1<<','<<b2<<',';
	}
  private:
	int b1,b2;
};
class C:public B
{
  public:
	C()
	{  c=0;  }
	C(int i)
	{  c=i;  }
	C(int i,int j,int k,int l):B(i,j,k),c(l)
	{  }
	~C()
	{  cout<<"In C.\n";  }
	void Print()
	{
		B::Print();
		cout<<c<<endl;
	}
  private:
	int c;
};
void main()
{
	C c1;
	C c2(10);
	C c3(10,20,30,40);
    c1.Print();
    c2.Print();
    c3.Print();
}