# 2.3 Pointers and arrays  (Page 7/8)

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```int a[100];int i, n; int max;printf("\n Enter the size of the array: "); scanf("%d",&n); // Read the number of elements of the arrayfor(i = 0; i<n; i++) {printf("\n a[%d] = ",i);scanf("%d",&a[i]);} // Find the maximum elementmax = a[0]; // max is initialized by a[0]// compare max to other elements for(i = 1; i<n; i++) if(max<a[i]) //meet an element greater than maxmax = a[i]; // replace max by the new value from the elements.printf("\n The maximum element of the array is: %d", max);```

## Searching

The simplest type of searching process is the sequential search. In the sequential search, each element of the array is compared to the key, in the order it appears in the array, until the first element matching the key is found. If you are looking for an element that is near the front of the array, the sequential search will find it quickly. The more data that must be searched, the longer it will take to find the data that matches the key using this process.

here is the sample session with the above program

```#include<stdio.h>#include<conio.h>void main() {int m[100], idx[100]; int n; // n is the actual size of the arrayint i, k, test; clrscr(); // clear screen// Read array m // Read the actual size of mprintf(“ Enter the number of elements scanf(“%d”,&n); // Read array’s elementsfor(i = 0;i<n;i++) {int temp; printf(“\n Enter the value of m[%d]= “,i); scanf(“%d”,&temp); m[i]= temp; }// Read the searching key k printf(“\n Enter the value you want to search : “);scanf(“%d”,&k); // Begin searchingtest = 0; // Scan all the elementsfor(i = 0;i<n;i++) if(m[i]= = k)//Compare the current element with the //searching key k{ // save the index of the current element idx[test]= i; test ++;} // Conclusionif(test>0) {printf(“\n there are %d elements which has the value of %d”,test,k); printf(“\n Indexes of those elements: “);for(i = 0;i<test;i++) printf(“%3d”,idx[i]); }else printf(“\n No element has the value %d”,k);getch(); // Wait until the user press any key }```

## Sorting

Selection sort is a sorting algorithm, specifically an in-place comparison sort. Selection sort is noted for its simplicity, and also has performance advantages over more complicated algorithms in certain situations. It works as follows:

• Find the minimum value in the list
• Swap it with the value in the first position
• Repeat the steps above for remainder of the list (starting at the second position)

Effectively, we divide the list into two parts: the sublist of items already sorted, which we build up from left to right and is found at the beginning, and the sublist of items remaining to be sorted, occupying the remainder of the array.

Here is an example of this sort algorithm sorting five elements:

```31 25 12 22 11 11 25 12 22 3111 12 25 22 31 11 12 22 25 31``` ```#include<stdio.h>#include<conio.h>void main() {int m[100];//100 is the maximum size for array mint n; // n is the number of elements int i, j, k; clrscr(); // clear screen// Read the elements of array m // Read the actual size of the arrayprintf(“ Enter the number of elements: “); scanf(“%d”,&n); // Read array elementsfor(i = 0;i<n;i++) {int temp; printf(“\n Enter the value of m[%d]= “,i); scanf(“%d”,&temp); m[i]= temp; }// Print the array printf(“\n The array before sorting: “);for(i=0;i<n;i++) printf(“%3d”,m[i]); // Begin to sortfor(i = 0; i<n-1;i++) {// Put the minimum value in the list of n-i elements //to the ith positionfor(j = i+1;j<n;j++) {// compare m[i] with other element of the sublist// and swap m[i] and m[j]if m[j]<m[i].if(m[j]<m[i]){ int temp;temp = m[j]; m[j]= m[i]; m[i]= temp; }} // Print the array after the i+1 th step of sorting processprintf(“\n The array after step %d”,i+1); for(k = 0;k<n ;k++) printf(“%3d”,m[k]); }getch(); // Wait until the user press any key. }```

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
what is variations in raman spectra for nanomaterials
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
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
why we need to study biomolecules, molecular biology in nanotechnology?
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
why?
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
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