This document discusses various types of operators in C++, including arithmetic, relational, logical, unary, assignment, compound assignment, conditional, and comma operators. It provides examples of how these operators function, particularly focusing on increment and decrement operations, as well as the usage of the conditional operator. Additionally, it introduces the sizeof operator and concludes with an invitation for questions.

1. Lecture # 03
ABDUL RAUF

2. Operator
 An operator is a symbol, which causes the
compiler to take an action.
Arithmetic Operator
 The arithmetic operators are used to perform
arithmetic operation.
 The five arithmetic operator supported by c++
includes:

3. Arithmetic Operator & Operator Precedence

4. Order of Precedence

5. Relational Operators
 Relational operators are used to form the
relational expression.
 A relational expression is the expression
whose result can either be true or false.

6. Relational Operators

7. Logical Operator ( &&, || )
Logical Operators are used to combine two or
more relational expression

8. Unary Operator
 Unary operator is an operator that operates on
a single variable or operand.
 Increase and decrease (++, --)
 Post Increment a++ ;
 Pre Increment ++a ;
 Post Decrement a-- ;
 Pre Decrement –a ;

9. #include <iostream>
using namespace std;
int main(){
int c;
// demonstrate postincrement
c = 5; // assign 5 to c
cout << c << endl; // print 5
cout << c++ << endl; // print 5 then postincrement
cout << c << endl; // print 6
cout << endl; // skip a line
// demonstrate preincrement
c = 5; // assign 5 to c
cout << c << endl; // print 5
cout << ++c << endl; // preincrement then print 6
cout << c << endl; // print 6
return 0; // indicate successful termination
} // end main

10. Assignment (=) Operator
 The assignment operator assigns a value to a
variable.
Compound assignment
 When we want to modify the value of a
variable by performing an operation on the
value currently stored in that variable we can
use compound assignment operators:

11. Compound Assignment

12. Conditional Operator (?:)
 The conditional operator evaluates an
expression returning a value if that expression
is true and a different one if the expression is
evaluated as false. Its format is:
 condition ? result1 : result2;
 If condition is true the expression will return
result1, if it is not it will return result2.

13. // conditional operator
#include <iostream>
using namespace std;
int main ()
{
int a,b,c;
a=2;
b=7;
c = (a>b) ? a : b;
cout << c;
return 0;
}

14. Comma Operator
 The comma operator is used to put more than
one expression, separated by commas, on a
single
 int x,y;
sizeof operator
 The sizeof operator is a unary operator that
returns the size, in bytes, of its argument.
 sizeof (int);

15. Any Question

16. Thanks