CPP 11
Quicksort.cpp Guest on 5th April 2021 10:52:03 AM
  1. /*
  2.  * quicksort.cpp
  3.  *
  4.  *  Created on: 25 Aug
  5.  *      Author: lucascordeiro
  6.  */
  7.  
  8. // quickSort.c
  9. #include <iostream>
  10.  
  11. using namespace std;
  12.  
  13.  
  14. void quick_sort(int arr[20],int,int);
  15.  
  16. int main()
  17. {
  18.  int arr[]={1,5,10,2,3},n=5,i;
  19.  
  20.  for(i=0 ; i<n ; i++)
  21.   printf(" Array[%d] = %d\n",i,arr[i]);
  22.  
  23.  quick_sort(arr,0,n-1);
  24.  
  25.  printf("\nThe Sorted Array is:\n\n");
  26.  
  27.  for(i=0 ; i<n ; i++)
  28.  {
  29.   printf(" %4d",arr[i]);
  30.  }
  31. }
  32.  
  33. void quick_sort(int arr[20],int low,int high)
  34. {
  35.  int pivot,j,temp,i;
  36.  if(low<high)
  37.  {
  38.   pivot = low;
  39.   i = low;
  40.   j = high;
  41.  
  42.   while(i<j)
  43.   {
  44.    while((arr[i]<=arr[pivot])&&(i<high))
  45.    {
  46.     i++;
  47.    }
  48.  
  49.    while(arr[j]>arr[pivot])
  50.    {
  51.     j--;
  52.    }
  53.  
  54.    if(i<j)
  55.    {
  56.     temp=arr[i];
  57.     arr[i]=arr[j];
  58.     arr[j]=temp;
  59.    }
  60.   }
  61.  
  62.   temp=arr[pivot];
  63.   arr[pivot]=arr[j];
  64.   arr[j]=temp;
  65.   quick_sort(arr,low,j-1);
  66.   quick_sort(arr,j+1,high);
  67.  }
  68. }

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