C++ Class Function/Method Friends?

[lolcheelol]

i'm trying to use the method friends in this class 3...here is the error im getting.

Error 2316 112: 'Host3::seeData (Class3)' is not a member of 'Host3'

class Host3;
class Class3: public Class2{
protected:
int *p5;
public:
Class3();
~Class3();
void inputData();
void showData();
friend int Host3::seeData(Class3 ); -----------$$$$$$$$$$$$-------LINE 112~~~~~
}; // Class3

Class3::Class3(){
cout << "\n\n\tClass3 Constructor";
p5 = new int;
}
Class3::~Class3(){
cout << "\n\n\tClass3 Destructor";
delete p5;
}
void Class3::inputData(){
cout << "\n\tEnter a character >> ";
cin >> *p1;
cout << "\n\tEnter a float >> ";
cin >> *p2;
cout << "\n\tEnter a string >> ";
cin >> *p4;
cout << "\n\tEnter an integer >> ";
cin >> *p5;
} 
void Class3::showData(){
cout << "\n\n\t" << *p2 << " is the float";
cout << "\n\n\t" << *p4 << " is the string";
cout << "\n\n\t" << *p5 << " is the integer";
}

class Host3{
public:
Host3(){cout<<"\n\tHost3C";}
~Host3(){cout<<"\n\tHost3D";}
int seeData(Class3 );
};

Host3::seeData(Class3 ){
cout << "\n\tEnter a character >> ";
cin >> *p1;
cout << "\n\tEnter a float >> ";
cin >> *p2;
cout << "\n\tEnter a string >> ";
cin >> *p4;
cout << "\n\tEnter an integer >> ";
cin >> *p5;
return 0;
}

thats my source code, i'm not really sure what im doing wrong.

[Banfa]

At the point in the file, line 112, that the friend statement appears on a forward declaration fro Hst3 has been seen by the compiler not a full definition so the compiler is unaware of any members of Host3 and you can not reference any of them.

To make that friend declaration the compiler needs to have seen the full definition of Host3 first.

[lolcheelol]

if i do that, then class 3 wouldn't be recognized in the Host3 class.

[Banfa]

Perhaps you should pass a Class3& to Host3::seeData then Host3 only requires a forward declaration of Class3

[lolcheelol]

yeah im still getting that one same error...

[Banfa]

You will need to do all of the following

pass a Class3& to Host3::seeData
forward declare Class3 before Host3
declare Host3 before Class3
declare Class3 before defining Host3::seeData if this method actually uses Class3