Can 2 classes share a friend function?

Question

Today i have a doubt regarding friend function. Can two classes have same friend function? Say example friend void f1(); declared in class A and class B. Is t

Answer 1

correction to the above code

#include
using namespace std;
class B;                   //defined later
class A;                  //correction (A also need be specified)
void add(A,B);

class A{
    private:
    int a;
    public:
    A(){
        a = 100;
    }
    friend void add(A,B);
};

class B{
    private:
    int b;
    public:
    B(){
        b = 100;
    }
    friend void add(A,B);
};

void add (A Aobj, B Bobj){
    cout << (Aobj.a + Bobj.b);
}

main(){
    A A1;
    B B1;
    add(A1,B1);
    return 0;
}