学步园

#include<iostream>

using namespace std;

class A{
private:
	
	int i;
	void fun1()
	{
		i = 40;
		cout<<"output something like this"<<endl;
	}

	friend int main();
	
};


int main()
{
	A a;
	a.fun1();
	cout<<a.i<<endl;

	return 0;
}