bucket sort algorithm added

Author: ameybhosle1

bucketsort.cpp

@@ -0,0 +1,42 @@
+// 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; 
+}