# 2.3 Pointers and arrays  (Page 6/8)

 Page 6 / 8

## Read the elements of a 1-dimensional array:

float a[10]; // declare a float array of size 10int i; // read the second element of the array : a[1]scanf(“%f”,&a[1]);// Assign an expression to the third element of the array a[2]= a[1] + 5;

To read the value for each element of an array, you should use for statement. For example,

int b[10];int i; // Read the value for each element of the arrayfor(i = 0; i<10; i++) {printf(“\n Enter the value of b[%d]”, i);scanf(“%d”,&b[i]);}

In case you do not now the exact number of elements, declare the maximum number of elements and use a variable to store the actual size of the array

int a[100]; // Declare the array with the number of elements not greater than 100int n; // n is the actual size of the array int i;printf(“\n Enter the number of elements: “); scanf(“%d”,&n); for(i = 0; i<n; i++) {printf("\n a[%d] = ", i);scanf("%d",&a[i]);}

C allow you to associate initializers with specific elements . To specify a certain element to initialize, place its index in square brackets. In other words, the general form of an element designator for array elements is:

int a[4] = {4, 9, 22, 16};float b[3] = {40.5, 20.1, 100};char c[5] = {‘h’, ‘e’, ‘l’, ‘l’, ‘o’};

The first statement is equivalent to four assign statements

a[0] = 4; a[1]= 9; a[2] = 22; a[3]= 16;

## Printing array elements

printf function are used to print the element of an array. In the following example, we print the element of array a in different ways

#include<stdio.h>#include<conio.h>void main() {int a[5];int i, k; // Read the elements of the arrayfor(i = 0; i<5; i++) {printf(“\n a[%d] = “, i);scanf(“%d”,&a[i]);} // print the value of element a[3]printf(“\n a[3]= %d”, a[3]);// Display all the elements of array a, each element in a line. for(i = 0; i<5; i++) printf(“\n%d”, a[i]); // Display all the elements of array a in a lineprintf(“\n”); // change to a new line for(i = 0; i<5; i++) printf(“%d “, a[i]); // Display all the elements of array a, k elements in a lineprintf(“\n Enter the value of k = “); scanf(“%d”,&k); for(i = 0; i<5; i++) {printf(“%d “,a[i]);if((i+1)%k == 0) // change to a new line after printing k //elementsprintf(“\n”); }getch(); }

here is the sample session with the above program

a[0] = 6a[1] = 14a[2] = 23a[3] = 37a[4] = 9a[3] = 376 1423 379 6 14 23 37 9Input the value of k = 2 6 1423 37 9

## Find the maximum value stored in the array.

The purpose of this function is to find the maximum value stored in the array

• Set up a trial minimum value. The function begins by declaring a variable named min and initializing that variable with a trial minimum value – value of the first element .
• Then the function uses a while loop to:
• Fetch the value stored in each element in the array
• Compare each of those values with the current value stored in the variable named max
• Possibly replace if the value fetched from an element is algebraically greater than the current value stored in max:
• The value fetched from the element is stored in the variable named max
• Replacing the value that was previously stored in the variable named max by the new value from the element.
• When all of the array elements have been examined and processed in this manner, the variable named max will contain the maximum value of all the values stored in the array.

#### Questions & Answers

are nano particles real
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
no can't
Lohitha
where we get a research paper on Nano chemistry....?
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
what about nanotechnology for water purification
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
what king of growth are you checking .?
Renato
how did you get the value of 2000N.What calculations are needed to arrive at it
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