lecture 03 anwar ghani iiui

7/29/2019 Lecture 03 ANWAR GHANI IIUI

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International Islamic University, Islamabad

Lecture-03: Basic concepts Advance Computer Programming


Advance Computer ProgrammingLecture-03

Anwar Ghani

Semester: Spring-2013

Department of Physics

Faculty of Basic & Applied Sciences


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Lecture outline

1. Variables Naming

Features of variables

2. Operators

Assignment Operators Arithmetic Operators

Precedence

3. Data Types

Int

Char

Float


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Welcome

#include

main ( )

{cout


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Variable

Variable X


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Variable

Pic of the memory

25

10323

name

of the

variable


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Components of Computer

Variable starts with

1. Character 2. Underscore _ (Not Recommended)


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Language hierarchy

Small post box

X





Variable

Variable is the name of a location in

the memory

e.g. x= 2;





Variable

In a program a variable has:

1. Name

2. Type3. Size

4. Value





Assignment operator

=x = 2

X 2





Assignment operator

L.H.S = R.H.S.

X+ 3 = y + 4 WrongZ = x +4

x +4 = Z Wrong





Assignment operator

X = 10 ;

X = 30 ;

X 10

X 30





X = X + 1;

10 + 1

=

X

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Data type

int i ; -> Declaration line

i

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#include main ( ){

int x ;int y ;int z ;x = 10 ;y = 20 ;

z = x + y ;

cout





int x, y, z ;

int x; int y; int z ;

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Data Types

1. int

2. short3. long

4. float

5. double

6. char

Lecture 03: Basic concepts Advance Computer Programming





Arithmetic operators

Plus +

Minus -

Multiply *

Divide /

Modulus %






Arithmetic operators

i + j

x * y

a / ba % b






% = Remainder

5 % 2 = 12 % 2 = 0






4 / 2 = 2

5 / 2 = ?



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Precedence

Highest: ( ) Next: * , / , %

Lowest: + , -



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Questions

lecture 03 anwar ghani iiui

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