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Operations on arrays

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

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Introduction to computer science. OpenStax CNX. Jul 29, 2009 Download for free at http://cnx.org/content/col10776/1.1
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