+

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:
	void Seta(int i,int j)
	{  a1=i;a2=j;  }
	void Showa()
	{  cout<<"A: "<<a1<<','<<a2<<endl;  }
  protected:
	int a1;
  private:
	int a2;
};
class B:public A
{
  public:
	void Setb(int i,int j)
	{  b1=i;b2=j;  }
	void Showb()
	{
		cout<<"B: "<<b1<<','<<b2<<endl;
		cout<<"A: "<<a1<<endl;
	}
  protected:
	int b1;
  private:
	int b2;
};
class C:public B
{
  public:
	void Setc(int i)
	{  c=i;  }
	void Showc()
	{  
		cout<<"C: "<<c<<endl;
		cout<<"B: "<<b1<<endl;
		cout<<"A: "<<a1<<endl;
	}
  private:
	int c;
};
void main()
{
	C c;
	c.Seta(3,4);
	c.Setb(13,14);
	c.Setc(5);
	c.Showa();
	c.Showb();
	c.Showc();
}