Scribd
Upload
15 views7 pages

Binary

The document outlines the binary search technique, including its aim, algorithm, and implementation in C programming. It provides a source code example demonstrating how to perform a binary search on an array of integers. The results confirm that the binary search algorithm has been successfully implemented and tested.

Uploaded by

sterlin1502
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
15 views7 pages

Binary

The document outlines the binary search technique, including its aim, algorithm, and implementation in C programming. It provides a source code example demonstrating how to perform a binary search on an array of integers. The results confirm that the binary search algorithm has been successfully implemented and tested.

Uploaded by

sterlin1502
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 7

BINARY SEARCH

AIM :
To learn about binary search technique and implement it in C programming language.

ALGORITHM :
Step 1: [INITIALIZE] SET BEG = 0
END=n-1, POS=-1
Step 2: Repeat Steps 3 and 4 while BEG <=END
Step 3: SET MID =(BEG+END)/2
Step 4: IF A[MID] = VAL
SET POS= MID
PRINT POS
Go to Step 6
ELSE IF A[MID] > VAL
SET END=MID-1
ELSE
SET BEG= MID+1
[END OF IF]
[END OF LOOP]
Step 5: IF POS=-1
PRINT "VALUE IS NOT PRESENT IN THE ARRAY"
[END OF IF]
Step 6: EXIT
SOURCE CODE:
#include <conio.h>
#include <stdio.h>

int Binarysearch(int[], int, int);

void main() {
int x[20], i, n, p, key;
printf("\nEnter the number of elements: ");
scanf("%d", &n);

printf("\nEnter %d elements in ascending order: ", n);


for (i = 0; i < n; i++) {
scanf("%d", &x[i]);
}

printf("\nEnter the element to search: ");


scanf("%d", &key);

p = Binarysearch(x, n, key);
if (p == -1) {
printf("\nSearch unsuccessful: %d not found in the array.\n", key);
} else {
printf("\nSearch successful: %d is found at location %d.\n", key, p + 1);
}
}

int Binarysearch(int a[], int n, int k) {


int lo = 0, hi = n - 1, mid;
printf("\n--- Binary Search Steps ---\n");

while (lo <= hi) {


mid = (lo + hi) / 2;

printf("\nChecking middle element: a[%d] = %d", mid + 1, a[mid]);


if (k == a[mid]) {
printf("\nMatch found! a[%d] = %d matches %d.\n", mid + 1, a[mid], k);
return mid;
} else if (k < a[mid]) {
printf("\nNo match. %d < %d, so we move to the left side.", k, a[mid]);
hi = mid - 1;
} else {
printf("\nNo match. %d > %d, so we move to the right side.", k, a[mid]);
lo = mid + 1;
}
}

printf("\nElement %d not found after searching all possible elements.\n", k);


return -1;
}
INPUT AND OUTPUT:
RESULT:

The binary search algorithm has been implemented in C and tested with sample input for correct
functioning.

You might also like