Answer Posted / jeremiah

A friend function needs to know the object on which it must
operate. Class member functions have an implicit "this"
pointer which define the object on which it must operate.

Example:
---------------------------------------------------------
class Number;

// A function that adds two numbers.
// This function must be a friend of the Number class
// because it operates on a private member variable of the
// Number class.
Number Add( const Number& lhs, const Number& rhs )
{
Number result;
result = lhs.m_value + rhs.m_value;
return result;
}

// The Number class
class Number
{
public:
// Constructor - Default to 0.
explicit Number( int value = 0 )
: m_value( value )
{}

// Copy constructor
Number( const Number& copy )
: m_value( copy.m_value )
{}

// Add this number with another and return the result.
// This operator only needs 1 argument because the
// Left-hand side is assumed to be the class itself.
Number operator+( const Number& rhs ) const
{
Number result;
result.m_value = m_value + rhs.m_value;
return result;
}

private:
// Allow the Add function to access the private members
// of this class by making it a friend function.
friend Number Add( const Number&, const Number& );
int m_value;
};
-----------------------------------------------------------

As you can see from the example, the "Add" function takes
two arguments (a left-hand side operator, and a right-hand
side operator), whereas the Number::operator+ member
function only needs to know the right-hand side operator
because the left-hand side operator is assumed to be the
class instance itself.

Why is oop better than procedural?

1021

---

What are the types of abstraction?

995

---

What is encapsulation and abstraction? How are they implemented in C++?

1064

---

What is overloading and its types?

1078

---

What is abstraction in oops?

979

---

What is encapsulation selenium?

953

---

Which language is not a true object oriented programming language?

1061

---

What is polymorphism give a real life example?

971

---

write a program using c++ to implement single contiguous memory mangement techniques.display the content of the main memory after yhe allocation of jobs and percentage of the wastage of the main memory

3172

---

What is purpose of inheritance?

1048

---

What is multilevel inheritance explain with example?

1086

---

Why oops is important?

1026

---

Give two or more real cenario of virtual function and vertual object

2282

---

What is debug class?what is trace class? What differences are between them? With examples.

2131

---

why reinterpret cast is considered dangerous?

2336

---