CONTENTS POINTER Pointer Explanation of Class Explaination of

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

• 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 ; };

• 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 () };

• 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

• 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;

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

Program Referencing & Dereferencing

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