C++ LanguageBy:-AAKASH KAUSHIK#9289817971, 98919893083Email-theaakashkumar@gmail.com

UNIT -4OPERATORS & EXPRESSIONS

OPERATORSAn operator is a symbol that tells the compiler to perform specific mathematical or logical manipulations. operators operates on some data to give results

For ex :- A+B=CHere A, B are operands and + is the

operator which produces C as a result of addition of A and B.

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Based on the no. of operand needed for operation operators can be broadly classified into 3 categories.UNARY OPERATORSBINARY OPERATORSTERNARY OPERATORS

CLASSIFICATION OF OPERATORS

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UNARY OPERATORSThe unary operators operate

on a single operand

UNARY (–) MINUS – used to represent –ive values.

ex.:- -5,-50,-3.14 etc.

UNARY (+) PLUS – used to represent +ive values.

ex.:- +5,+50,+3.14 etc.

In C++ by default values are considered as +ive so no need to explicitly use UNARY (+)PLUS.

UNARY PLUS(+) & UNARY MINUS(-)

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Increment operator increases integer value by one.For ex.:-int a=10;a++; //will give 11

Decrement operator decreases integer value by one.For ex.:-int a=10;a--; //will give 9

INCREMENT/DECREMENT OPERATOR

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BINARY OPERATORSThe Binary operator takes 2

arguments.

ARITHMETIC OPERATORSRELATIONAL OPERATORSLOGICAL OPERATORS

TYPE OF BINARY OPERATORS

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Arithmetic operators are used for mathematic calculations.

ARITHMETIC OPERATORS

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A relational operator compares two operands to determine whether one is greater than, greater than or equal to, less than, less than or equal to the other.

If the condition is true, it will return non-zero value, if the condition is false, it will return 0.

RELATIONAL OPERATORS

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RELATIONAL OPERATORS

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Logical operators are used in situation when we have more then one condition in a singlestatement.The logical operators && and || are used when evaluating two expressions to obtain a single relational result.The logical operator ! Is used for negation purpose. Basically, it returns the opposite Boolean value of evaluating its operand.

LOGICAL OPERATORS(AND,OR,NOT)

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LOGICAL OPERATORS

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TERNARY OPERATORSTHE ONE AND ONLY TERNARY OPERATOR IS CONDTIONAL

OPERATOR( ? : )

The conditional operator is also known as ternary operator. It is called ternary operator because it takes three arguments. First is condition, second and third is value. The conditional operator check the condition, if condition is true, it will return second value, if condition is false, it will return third value.

Syntax:-val = condition ? val1 : val2;

CONDITIONAL OPERATOR

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#include<iostream.h>#include<conio.h> void main() {clrscr(); int x=5,y=2,lrg;lrg = (x>y) ? x : y; cout<<"\nlargest number is : "<<lrg;getch();}Output : Largest number is : 5

TERNARY OPERATOR USAGE EXAMPLE

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SOME MORE SPECIAL OPERATORS

SIZEOF & COMMA OPERATOR

The sizeof is a compile time operator, and used with an operand, it returns the number of bytes the operand occupies. The operand may be a variable, a constant or a data type qualifier.

m=sizeof(sum);n=sizeof(long int);

k=sizeof(235L);

SIZEOF OPERATOR

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The comma operator (,) is used to separate two or more expressions that are included where only one expression is expected. When the set of expressions has to be evaluated for a value, only the right-most expression is considered.For example, the following code: a = (b=3, b+2);would first assign the value 3 to b, and then assign b+2 to variable a. So, at the end, variable a would contain the value 5 while variable b would contain value 3.

COMMA OPERATOR(,)

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THANK YOU

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