Monday, December 2, 2019

Shell Sort in C++

I wrote this program that will accept ten numbers and then the program will sort the given number and display the sorted values using shell sort algorithm using C++ programming language.

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Sample Program Output


Program Listing

shell.cpp

// shell_sort.cpp
// Jake R. Pomperada, MAED-IT
// December 2, 2019

#include <iostream>

using namespace std;

void shellSort(int array[], int n)
{
  for (int gap = n / 2; gap > 0; gap /= 2)
  {
    for (int i = gap; i < n; i += 1)
    {
      int temp = array[i];
      int j;
      for (j = i; j >= gap && array[j - gap] > temp; j -= gap)
      {
        array[j] = array[j - gap];
      }
      array[j] = temp;
    }
  }
}
void printArray(int array[], int size)
{
  int i;
  cout <<"\t";
  for (i = 0; i < size; i++)
    cout <<" " << array[i] << " ";
  cout << endl;
}

int main()
{
 int data[10];

 cout <<"\n\n";
 cout << "\tShell Sort in C++";
 cout <<"\n\n";
 for (int a=0; a<10; a++) {
    cout << "\tEnter item value number " <<a+1 <<" : ";
cin >> a[data]; 
  }
  cout <<"\n\n";
  cout << "\tUnSorted array: \n";
  cout <<"\n\n";
  cout <<"\t";
  for (int a=0; a<10; a++) {
  cout <<" " <<a[data] <<" ";
  }
  cout <<"\n\n";
  int size = sizeof(data) / sizeof(data[0]);
  shellSort(data, size);
  cout << "\tSorted array: \n";
  cout <<"\n\n";
  printArray(data, size);
}



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