The document discusses various operators in C++ including scope resolution (::), memory allocation/release (new/delete), pointer to member declarator (::*), and manipulators like endl and setw. It explains that :: accesses global variables from inner blocks, new/delete allocate and destroy objects, and ::* and -> access class members through pointers. It also briefly mentions expression types like constant, integer, relational, and special assignment expressions involving chained, embedded, and compound assignment.

1. OPERATORS
IN
C++
K.THAMIZHSELVI
Asst. Prof. of Computer Science
Bon Secours College for Women, Thanjavur

2. Other New Operators
• Scope Resolution Operator (::)
• Pointer to member Declarator (::*)
• Pointer to Member Operator (-> , .*)
• Memory release Operator (delete)
• Memory Allocation Operator (new)
• Line feed Operator (endl)
• Field width Operator (setw)

3. Scope Resolution Operator
:: variable name
Global variable can be access from within the
inner block using Scope resolution operator.

4. Member Dereferencing Operators
• C++ allow to define class of different data
types and functions.
• Also permit to access class member through
pointers.
• 3 types:
– Pointer to member Declarator (::*)
– Pointer to Member Operator (-> , .*)

5. Memory Management Operators
• Unary operators new and delete
• Alice known as free store operators.
• An object created by new and destroyed by
delete.
• GF:
Pointer variable = new data type;
Pointer variable = new data type(value);
Pointer variable = new data type[size];
a = new int;
int *p = new int; (or) *p = 25;
Int *p = new int (25);
Int *p = new int [10];

6. • Delete:
When the data object is not needed, it is
destroyed by using delete operator to free up
the memory space.
GF:
delete pointer variable;
delete [size] pointer variable;
delete p;
delete [] p;

7. Manipulators
• endl – output statement – new line character
• setw – to display in right justification – specify
the width
• Eg: cout<< setw(5) <<sum <<endl;
3 4 5

8. EXPRESSIONS
• Combination of operators, constants and
variables.
• 7 types:
– Constant expression
– Integer expression
– Float expression
– Pointer expression
– Relational expression
– Logical expression
– Bitwise expression

9. SPECIAL ASSIGNMENT EXPRESSION
• Chained Assignment
x = y = 5;
• Embedded Assignment
x = (y = 50) + 10;
• Compound Assignment
x + = 10;

10. THANK
YOU