#include <iostream>
using namespace std;
class B;
class A{
private:
int a;
public:
void setData(int x){
a=x;
}
friend void fun(A,B);
};
class B{
private:
int b;
public:
void setData(int y){
b=y;
}
friend void fun(A,B);
};
void fun(A o1, B o2){
cout<< "Sum is "<<o1.a + o2.b;
}
int main(){
A obj1;
B obj2;
obj1.setData(5);
obj2.setData(6);
fun(obj1, obj2);
}
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