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Computer Programming for Engineering

( Course Code: EECP 1290 )

Lecturer : P. GOPI KRISHNAB.Tech, M.Tech, (Ph.D), MIE,MISTE

Arrays Conceptwith Animations

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Today Topics

1. What is Array?

2. Why Use Array?

3. Where Arrays will be useful?

(i.e Applications of Arrays)

4. How arrays are used with some

Programming Examples

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1. Introduction to Arrays:

char v[0]=a, v[1]=e ,v[2]=i ,v[3]=o ,v[4]=u ;

The same will be represented easily aschar v[5]={ a , e , i , o, u} ;

char grade[6]={ A, B , , D , E , F}

char fruits[4]= {apple, banana, cherry, mango }

char subject[4]= { C++, Physics,Chemistry, Maths}

int marks[11]={100, 90, 80 , 70, 60, 50,40,30,20,10,0}

int speed[5]={80, 60, 40,20,0}

In the above lines vowel[5], grade[6], fruits[4],

subject[4], marks[11], speed[5] are ARRAYS.

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What is Array ? Name of array is c

Position number of

the element within

array c

c[6]

-456

0

72

1543

-89

0

62

-3

1

6453

78

c[0]c[1]

c[2]

c[3]

c[11]

c[10]

c[9]

c[8]

c[7]

c[5]

c[4]

int c[12]={-45,6,0,72,1543,-89,0,62,-3,1,6453,78}

Here c[0], c[1] ,c[2] . . . ., c[10], c[11] are

Variable names.

Now let us define array ?

An array is a sequence of variablenames that shares same name c forvariables c[0], c[1] ,c[2] . . . ., c[10], c[11] .

A single dimensional array is just like

one row of MATRIX.

A multi dimensional array is just like

MATRIX with rows and columns.

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Why use Array ? Arrays are useful to store a large number of values

of the same data type.Where Array are useful? (Applications)

To create students data base with marks, details

Bank Applications, Industry &Scientific applications ,Air Ticket Reservations, .

In all these applications a large data will be stored

and retrieved (recall).

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How Arrays Used ?The array syntax is as follows

Datatype ArrayName[Length];

Examples:

char grade[6]={ A, B , , D , E , F}

char fruits[4]= {apple, banana, cherry, mango }

char subject[4]= { C++, Physics,Chemistry, Maths}

int marks[11]={100, 90, 80 , 70, 60, 50,40,30,20,10,0}

int speed[5]={80, 60, 40,20,0}

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Program to Print Elements of Arrayint _tmain(int argc, _TCHAR* argv[])

{int i;int Marks[5] = {96, 85, 59, 90, 76};

for(i=0 ; i

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Program to Print Elements of Array in REVERSE ORDER

int _tmain(int argc, _TCHAR* argv[])

{int i;int Marks[5] = {96, 85, 59, 90, 76};

for(i=4 ; i >= 0 ; i=i-1 )

{

cout=0 YES

Marks[1]=85 85

i= 1-1=0

0 >=0 YES

Marks[0]=96 96

i= 0-1=-1

-1 >=0 NO

Program Ends

M[0] M[1] M[2] M[3] M[4]