This document provides an explanation of classes, objects, and pointers in C++. It defines a class as a user-defined data type with data members and member functions. An object is an instance of a class in memory. Pointer variables can store the memory addresses of other variables and objects. The ampersand operator (&) returns the address of a variable, while the asterisk operator (*) dereferences a pointer to access the value at a memory address.

1. CONTENTS
• Pointer.
• Explanation of Class.
• Explaination of Object.
• Referencing Operator & Dereferencing Operator.
• Program Explanation.
• Explaination of Pointer to Object.
POINTER

2. • CLASS
# A Class is a user defined data type which has data
member & member functions.
# It is declared by using keyword “Class”.
# Syntax :
Class class_name
{
access specifier :
data members;
member function ()
};
# Example:
Class car
{
private :
int spd lmt ;
int inc.spd ;
};

3. • Object
# An object is an instance(occurence) of a class, when a class is
defined no memory is allocated but when object is created memory is
allocated.
# Syntax:
Class_name obj_name;
# Example:
Class student
{
private :
int roll;
char name [10];
public :
void getdata ()
void putdata ()
};

4. • Pointer to Object
# Just like other pointers, the object pointers are declared by placing in front
of a object pointer’s name.
# Syntax :
class_name * object_pointer_name;
# Eg.
date * ptr;
# To access the public members using an object Dot ( . ) operator is used,
and to access public membes using object pointer, the arrow ( -> ) operator
is used

5. • Pointers
# Pointer is a vaiable which is used to store memory address of another
variable.
# Pointer is basically derived data type of C++.
# Declaration of Pointer
Syntax:
data_type * variable_name;
Eg.
1. int * ptr;
2. float * ptr;
3. char * ptr;

6. REFERENCING OPERATOR & DEREFERENCING OPERATOR
1) Address of Operator (Reference operator &) :-
Syntax-
&variable name
e.g P=&X;
2) Dereferencing Operator ( Value of Operator * ):-
e.g y=*p;

7. Program Referencing & Dereferencing

8. THANKS