frindداله

try with this Code, Sorry if I have many Errors Ihaven't C++ Compiler

public class A
{
frind: class B;   
private: 
   int x;
   public: 
    A(int z);
    void setX(int z);
    int getX();

 };

public class B
{
private: int  y;   
public: 
    void setY(A a);

};
public class C
{
private:
int z;
public:
void setZ(A a);

};
A::A(int z)
{
   x=z;
}

int A::getX()
{
return x; 
}

void A::setX(int z)
{
    x=z;
}

void B::setY(A *a)
{
  y=a->x; /*its Correct */
}

void C::setZ(A *a)
{
  z:=a->x;/* error becuse x is Private in A*/
z:=a->getX();/* OK*/
}

void main()
{
A *a;
B *b;
C *c;
a=new A(5);
b=new B();
c->new C();
b->setY(a);

c->setZ(a);
}

the Code is corrected

#include 
class A;
class B;
class C;

class A
{
	friend class B;   
	private: 
	int x;
	 public: 
		A(int z);
		void setX(int z);
		int getX();
		void describeMe();

 };

class B
{
		private: int  y;   
		public: 
		void setY(A*  a);
		void describeMe();

};


class C
{
	private:
			int z;
	public:
		void setZ(A *a);
		void describeMe();

};


A::A(int z)
{
   x=z;
}

void A::describeMe()
{
	cout<<"nIm a Instance for class A and my value is:"<}

int A::getX()
{
	return x; 
}

void A::setX(int z)
{
    x=z;
}

void B::setY(A *a)
{
  y=a->x; /*its Correct */
}

void B::describeMe()
{
	cout<<"nIm a Instance for class B and my value is:"<}

void C::setZ(A *a)
{
	//z:=a->x;/* error becuse x is Private in A*/
	  z=a->getX();/* OK*/
}

void C::describeMe()
{
	cout<<"nIm a Instance for class C and my value is:"<}

void main()
{
A *a;
B *b;
C *c;
a=new A(5);
b=new B();
c=new C();
b->setY(a);

c->setZ(a);

a->describeMe();
b->describeMe();
c->describeMe();
};

كثر خيرك الله عليك بس ودي تشرح لي اليه العمل للفرند في هالبرنامج ولا عليك امر

I make it in the next days

1 we have 3 classes A,B and C

2 in the Class A we have defined some variable as Private

3 The Class B is friend from class A, but Class C is not friend from A

4 in the Class B we can used the Private variable of Class A

for Examble

void B::setY(A *a)
{
  y=a->x; /*its Correct  becuse B is friend of A*/
}

5 in the Class C we can't use the private variable of class A but we can uese the public members or methods

For Examble

void C::setZ(A *a)
{
    z:=a->x;/* error becuse x is Private in A*/
z=a->getX();/*Ok becuse getx() is public*/


}

if u don't understand me please send me email in Arabic and I'll help u