Yes, Friend functionality is not restricted to only one class. One function can be a friend of many classes.
#include <iostream>
using namespace std;
class T4Tutorials_2;
class T4Tutorials_1 {
private:
int n1=1;
public:
friend int add(T4Tutorials_1, T4Tutorials_2);
};
class T4Tutorials_2 {
private:
int n2=6;
public:
friend int add(T4Tutorials_1 , T4Tutorials_2);
};
int main()
{
T4Tutorials_1 object1;
T4Tutorials_2 object2;
cout<<"Sum: "<< add(object1, object2);
return 0;
}
int add(T4Tutorials_1 object1, T4Tutorials_2 object2)
{
return (object1.n1 + object2.n2);
}
Output
Sum: 7
