Added bucket sort algorithm

C++/Algorithms/Sorting/bucket-sort.cpp

@@ -0,0 +1,47 @@
+
+// C++ program to sort an 
+// array using bucket sort
+#include <algorithm>
+#include <iostream>
+#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 function */
+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;
+}