C++ Program for Recursive Bubble Sort
Last Updated :
21 Jul, 2023
Background: Bubble Sort is the simplest sorting algorithm that works by repeatedly swapping the adjacent elements if they are in the wrong order. Following is the iterative Bubble sort algorithm :
// Iterative Bubble Sort
bubbleSort(arr[], n)
{
for (i = 0; i n-1; i++)
// Last i elements are already in place
for (j = 0; j < n-i-1; j++)
swap(arr[j], arr[j+1]);
}
Recursion Idea
- Base Case: If array size is 1, return.
- Do One Pass of normal Bubble Sort? This pass fixes the last element of the current subarray.
- Recur for all elements except the last of the current subarray.
Recursive Bubble Sort Implementation in C++
C++
#include <bits/stdc++.h>
using namespace std;
void bubbleSort( int arr[], int n)
{
if (n == 1)
return ;
for ( int i = 0; i < n - 1; i++)
if (arr[i] > arr[i + 1])
swap(arr[i], arr[i + 1]);
bubbleSort(arr, n - 1);
}
void printArray( int arr[], int n)
{
for ( int i = 0; i < n; i++)
printf ( "%d " , arr[i]);
printf ( "\n" );
}
int main()
{
int arr[] = { 64, 34, 25, 12, 22, 11, 90 };
int n = sizeof (arr) / sizeof (arr[0]);
bubbleSort(arr, n);
printf ( "Sorted array : \n" );
printArray(arr, n);
return 0;
}
|
Output
Sorted array :
11 12 22 25 34 64 90
Time Complexity: O(n*n)
Auxiliary Space: O(1)
Please refer complete article on Recursive Bubble Sort for more details!
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