10-1.cpp

来自「为C++学习者」· C++ 代码 · 共 24 行

#include<iostream.h>
class Sample
{
  int n;
public:
	Sample(){}
	Sample(int m){n=m;}
	friend void square(Sample &s)
	{
	  s.n=s.n*s.n;
	}
	void disp()
	{
	  cout<<"n="<<n<<endl;
	}
};
void main()
{
  Sample a(10);
  square(a);
  a.disp();
}