Scope Resolution Operator- Part (B)

// This program is to demonstrate the first use of Scope Resolution Operator
#include<iostream.h>
class dummy
{
private:
int d;
void f1();
void f2()
{
cout<<" I am private function of the class. my name is f2 & defined inside d class";
}
public:
void f3();
void f4()
{
cout<<" I am public function of the class. my name is f4 & defined inside d class";
}

};
void dummy::f1()
{
cout<<" I am private function of the class. my name is f1 & defined outside d class using SRO";
}
void dummy::f3()
{
cout<<" I am public function of the class. my name is f3 & defined outside d class using SRO";
}
void main()
{
dummy D;
D.f1();// Error
D.f2();// Error
D.f3();//No Error
D.f4();//No Error
}