原创 friend对象和friend类

/*
 * ccb.cpp
 *
 *  Created on: 2024-6-7
 *      Author: root
 */

#include
using std::cout;
using std::endl;
class Class1;
class Class2;
class Class1
{
	friend class Class2;
public:
	void Class();
private:
	int a;
};
void Class1::Class()
{
	a=1234;
}

class Class2
{
public:
	void CopyC1toC2(Class1 &c1);
	int a;
};
void Class2::CopyC1toC2(Class1 &c1)
{
	a=c1.a;
}
int main()
{
	Class1 c1;
	Class2 c2;
	c2.CopyC1toC2(c1);
	cout << c2.a << endl;
	return 0;
}