7_1.cpp

c++上课用的代码

#include <iostream>
using namespace std;

class animal
{
public:
	int age; 

};


class dog : public animal
{


public:
	void setage(int n)
	{
	  age=n;
	};


};

void main()
{
  dog d;
  cout<<"enter age!"<<endl;
  int a;
  cin>>a;
  d.setage(a);
  cout<<d.age;
  cout<<endl;
}