Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Shell Sort program in C#
Shell Sort allows the exchange of items that are far apart in the array and then reduces the gap between them. This is a sort of generalization of Insertion Sort. Shell Sort is known as such as it was published by Donald Shell at first.
A program that demonstrates shell sort in C# is given as follows −
Example
using System;
namespace ShellSortDemo {
public class Example {
static void shellSort(int[] arr, int n) {
int i, j, pos, temp;
pos = 3;
while (pos > 0) {
for (i = 0; i < n; i++) {
j = i;
temp = arr[i];
while ((j >= pos) && (arr[j - pos] > temp)) {
arr[j] = arr[j - pos];
j = j - pos;
}
arr[j] = temp;
}
if (pos / 2 != 0)
pos = pos / 2;
else if (pos == 1)
pos = 0;
else
pos = 1;
}
}
static void Main(string[] args) {
int[] arr = new int[] { 56, 12, 99, 32, 1, 95, 25, 5, 100, 84 };
int n = arr.Length;
int i;
Console.WriteLine("Shell Sort");
Console.Write("Initial array is: ");
for (i = 0; i < n; i++) {
Console.Write(arr[i] + " ");
}
shellSort(arr, n);
Console.Write("
Sorted Array is: ");
for (i = 0; i < n; i++) {
Console.Write(arr[i] + " ");
}
}
}
}Output
The output of the above program is as follows.
Shell Sort Initial array is: 56 12 99 32 1 95 25 5 100 84 Sorted Array is: 1 5 12 25 32 56 84 95 99 100
Now let us understand the above program.
In the main() function, first the initial array is displayed. Then, the function shellSort() is called to perform shell sort on the array. The code snippet for this is given as follows −
int[] arr = new int[] { 56, 12, 99, 32, 1, 95, 25, 5, 100, 84 };
int n = arr.Length;
int i;
Console.WriteLine("Shell Sort");
Console.Write("Initial array is: ");
for (i = 0; i < n; i++) {
Console.Write(arr[i] + " ");
}
shellSort(arr, n);In the function shellSort(), the given array is sorted using a while loop and a for loop. The gap used for shell sort is 3. he code snippet for this is given as follows.
static void shellSort(int[] arr, int n) {
int i, j, pos, temp;
pos = 3;
while (pos > 0) {
for (i = 0; i < n; i++) {
j = i;
temp = arr[i];
while ((j >= pos) && (arr[j - pos] > temp)) {
arr[j] = arr[j - pos];
j = j - pos;
}
arr[j] = temp;
}
if (pos / 2 != 0)
pos = pos / 2;
else if (pos == 1)
pos = 0;
else
pos = 1;
}
}
638 Views
