Class Best Friend

[xgiovio]

#include <iostream>
#include <string>

using namespace std;



class test {

    friend void modify (test * ptr, int b);
public:
    test (int ain=0, int bin = 0, int cin=0)
    :a(ain),b(bin),c(cin){}
    
    void print (){
        cout<< a << endl;
        cout<< b << endl;
        cout<< c << endl;
    }
    
private:
    int a, b, c;
    
    

};


void modify (test * ptr, int value){

    ptr->a=value;
    ptr->b=value;
    ptr->c=value;

}


int main (){
    
    

    test obj;
    obj.print();
    modify(&obj,50);
    obj.print();
    
    
    
    
    
    return 0;


}