Different types of operators in C++

C++Server Side ProgrammingProgramming

There are many types of operators in C++. These can be broadly categorized as: arithmetic, relational, logical, bitwise, assignment and other operators.

Arithmetic Operators

Assume variable A holds 10 and variable B holds 20, then −

Operator
Description
       +        
Adds two operands. A + B will give 30
-
Subtracts second operand from the first. A - B will give -10
*
Multiplies both operands. A * B will give 200
/
Divides numerator by de-numerator. B / A will give 2
%
Modulus Operator and remainder of after an integer division. B % A will give 0
++
Increment operator, increases integer value by one. A++ will give 11
--
Decrement operator, decreases integer value by one. A-- will give 9


Relational Operators

Assume variable A holds 10 and variable B holds 20, then −

Operator
Description
==
Checks if the values of two operands are equal or not, if yes then condition becomes true.      (A == B) is not true.
!=
Checks if the values of two operands are equal or not, if values are not equal then condition becomes true.(A != B) is true.
>
Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true.(A > B) is not true.
<
Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true.(A < B) is true.
>=
Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true.(A >= B) is not true.
<=
Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.(A <= B) is true.


Logical Operators

Assume variable A holds 1 and variable B holds 0, then −

Operator
Description
&&
Called Logical AND operator. If both the operands are non-zero, then condition becomes true.(A && B) is false.
||
 Called Logical OR Operator. If any of the two operands is non-zero, then condition becomes true.(A || B) is true.
!  
Called Logical NOT Operator. Use to reverses the logical state of its operand. If a condition is true, then Logical NOT operator will make false.!(A && B) is true.


Bitwise Operators

Bitwise operator works on bits and perform bit-by-bit operation. The truth tables for &, |, and ^ are as follows.

pqp & qp | qp ^ q
00000
01011
11110
10011


Assume if A = 60; and B = 13; now in binary format, they will be as follows −

A = 0011 1100
B = 0000 1101
-----------------
A&B = 0000 1100
A|B = 0011 1101
A^B = 0011 0001
~A  = 1100 0011


Operator  
Description
&
Binary AND Operator copies a bit to the result if it exists in both operands.(A & B) will give 12 which is 0000 1100
|
Binary OR Operator copies a bit if it exists in either operand.(A | B) will give 61 which is 0011 1101
^
 Binary XOR Operator copies the bit if it is set in one operand but not both.(A ^ B) will give 49 which is 0011 0001
~
Binary Ones Complement Operator is unary and has the effect of 'flipping' bits.(~A ) will give -61 which is 1100 0011 in 2's complement form due to a signed binary number.
<<
Binary Left Shift Operator. The left operands value is moved left by the number of bits specified by the right operand.A << 2 will give 240 which is 1111 0000
>>
Binary Right Shift Operator. The left operands value is moved right by the number of bits specified by the right operand.A >> 2 will give 15 which is 0000 1111


Assignment Operators


Operator
Description
=
Simple assignment operator, Assigns values from right side operands to left side operand.C = A + B will assign value of A + B into C
+=
Add AND assignment operator, It adds right operand to the left operand and assign the result to left operand.C += A is equivalent to C = C + A
-=
Subtract AND assignment operator, It subtracts right operand from the left operand and assign the result to left operand.C -= A is equivalent to C = C - A
*=
 Multiply AND assignment operator, It multiplies right operand with the left operand and assign the result to left operand.C *= A is equivalent to C = C * A
/=
Divide AND assignment operator, It divides left operand with the right operand and assign the result to left operand.C /= A is equivalent to C = C / A
%=
Modulus AND assignment operator, It takes modulus using two operands and assign the result to left operand.C %= A is equivalent to C = C % A
<<=
Left shift AND assignment operator.C <<= 2 is same as C = C << 2
>>=
Right shift AND assignment operator.C >>= 2 is same as C = C >> 2
&=
Bitwise AND assignment operator.C &= 2 is same as C = C & 2
^=
Bitwise exclusive OR and assignment operator.C ^= 2 is same as C = C ^ 2
|=
Bitwise inclusive OR and assignment operator.C |= 2 is same as C = C | 2

    

Misc Operators


Sr.No
Operator
1sizeof operator returns the size of a variable. For example, sizeof(a), where ‘a’ is integer, and will return 4.
2Conditional operator (?:) If Condition is true then it returns value of X otherwise returns value of Y.
3Comma operator causes a sequence of operations to be performed. The value of the entire comma expression is the value of the last expression of the comma-separated list.
4(dot) and → (arrow) Member operators are used to reference individual members of classes, structures, and unions.
5() - Casting operators convert one data type to another. For example, int(2.2000) would return 2.
6Pointer operator & returns the address of a variable. For example &a; will give the actual address of the variable.
7Pointer operator * is pointer to a variable. For example *var; will pointer to a variable var.

 

raja
Published on 15-Feb-2018 12:51:45
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