TheAlgorithms-C-Plus-Plus/sorting/bucket_sort.cpp

// C++ program to sort an array using bucket sort
#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;

// Function to sort arr[] of size n using bucket sort
void bucketSort(float arr[], int n)
{
   // 1) Create n empty buckets
   vector<float> b[n];

   // 2) Put array elements in different buckets
   for (int i = 0; i < n; i++)
   {
      int bi = n * arr[i]; // Index in bucket
      b[bi].push_back(arr[i]);
   }

   // 3) Sort individual buckets
   for (int i = 0; i < n; i++)
      sort(b[i].begin(), b[i].end());

   // 4) Concatenate all buckets into arr[]
   int index = 0;
   for (int i = 0; i < n; i++)
      for (int j = 0; j < b[i].size(); j++)
         arr[index++] = b[i][j];
}

/* Driver program to test above funtion */
int main()
{
   float arr[] = {0.897, 0.565, 0.656, 0.1234, 0.665, 0.3434};
   int n = sizeof(arr) / sizeof(arr[0]);
   bucketSort(arr, n);

   cout << "Sorted array is \n";
   for (int i = 0; i < n; i++)
      cout << arr[i] << " ";
   return 0;
}