Tutorial on Special Operators of C Language

Special Operators of C:

1. Comma Operator
2. Size of()
3. Address Operator
4. Dereferencing Operator
5. Dot Operator
6. Arrow Operator

Lets we have to Discuss Some Popular Special Operators of C:

=> Sizeof () Operator:

• This Operator returns the size(i.e number of bytes) of operand.
• It should be written in lowercase Letter.
• The operand may be constant , a variable , or a data type.
• It is used for dynamic memory allocation.
• It is also used to determine the size of arrays and structures.

Syntax:

sizeof (operand);

Example:

x = sizeof (int);

y = sizeof (sum);

Program of Sizeof () Operator:

Statement: This Program illustrates the use of sizeof () Operator:

#include<stdio.h>

#include<conio.h>

void main()

{

int a;

float b;

char ch = 'c' ;

clrscr();

a = 2;

b = 10.0;

printf(" Size of a = %d\n" , sizeof (a) );

printf(" Size of b = %f\n" , sizeof (b) );

printf(" Size of ch = %c\n" , sizeof (ch) );

getch();
}

Output:

Size of a = 2

Size of b = 4

Size of ch = 1

=> Shorthand Assignment Operators:

• C provides a compact way of writing assignment Statements in an Expression.
• This is basically associated with all arithmetic Operators and bitwise Operators.

Syntax:

var | operator | = | exp |  ;

where

var => is a variable

operator => an airthmetic or bitwise operator

exp => is an Expression

NOTE:  

• There is no space between the operator and the '=' sign in compact representation.

• Shorthand Assignment operators are easier to read , write and understand.

Program of Shorthand Assignment Operators:

#include<stdio.h>

#include<conio.h>

void main()

{

int a , b , c;

a = 3;

b = 4;

c = 1;

clrscr();

a += b;

b -= a;

c *= x;

printf("%d\n" , a);

printf("%d\n" , b);

printf("%d\n" , c);

gatch();
}

Output:

 7

 -1

 5

Did you check the following?

• Detailed Discription of C Language Operators Section-1

• Detailed Discription of C Language Operators section-2

• Overview of C Increment and Decrement Operator with Example

• Explanation of Bitwise C Operator with Examples

                                                         
                                                                  That's All