exam1.cpp

来自「C++语言程序设计题典」· C++ 代码 · 共 18 行

#include <iostream.h>
class Sample
{
	int n;
public:
	Sample(int i) { n=i; }
	friend int add(Sample &s1,Sample &s2);
};
int add(Sample &s1,Sample &s2)
{
	return s1.n+s2.n;
}
void main()
{
	Sample s1(10),s2(20);
	cout << add(s1,s2) << endl;
}