​C++ Scope Resolution Operator (::) Example: Defining Class Methods Outside the Class

CODE:

#include<iostream>

using namespace std;

class student

{ 

private:

int id;

public:

void setid(int i)

{ 

id=i;

}

int getid();

};

int student::getid()

{ 

cout<<"The ID of Student is : "<<id<<endl;

}

int main()

{ 

student s;

s.setid(24);

s.getid();

}

Explanation:

​Clean Class: Class ke andar sirf function ka naam (getid();) likha gaya hai, jis se class choti aur saaf nazar aati hai.

​Scope Resolution Operator (::): Ye operator Google ko batata hai ke getid() function darasal student class ka hissa hai, bhale hi wo class ke bahar likha ho.

​Syntax: Iska tareeqa ye hota hai: Return_Type Class_Name :: Function_Name().

​Encapsulation: Is mein bhi id private hai, yani data hiding ka concept barkarar hai.

​ Output:

​The ID of Student is : 24