Added bucket sort algorithm under c++

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;
+}

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

@@ -0,0 +1,76 @@
+
+// C++ implementation of Radix Sort
+
+#include <iostream>
+using namespace std;
+
+// A utility function to get maximum value in arr[]
+int getMax(int arr[], int n)
+{
+    int mx = arr[0];
+    for (int i = 1; i < n; i++)
+        if (arr[i] > mx)
+            mx = arr[i];
+    return mx;
+}
+
+// A function to do counting sort of arr[] according to
+// the digit represented by exp.
+void countSort(int arr[], int n, int exp)
+{
+    int output[n]; // output array
+    int i, count[10] = { 0 };
+
+    // Store count of occurrences in count[]
+    for (i = 0; i < n; i++)
+        count[(arr[i] / exp) % 10]++;
+
+    // Change count[i] so that count[i] now contains actual
+    //  position of this digit in output[]
+    for (i = 1; i < 10; i++)
+        count[i] += count[i - 1];
+
+    // Build the output array
+    for (i = n - 1; i >= 0; i--) {
+        output[count[(arr[i] / exp) % 10] - 1] = arr[i];
+        count[(arr[i] / exp) % 10]--;
+    }
+
+    // Copy the output array to arr[], so that arr[] now
+    // contains sorted numbers according to current digit
+    for (i = 0; i < n; i++)
+        arr[i] = output[i];
+}
+
+// The main function to that sorts arr[] of size n using
+// Radix Sort
+void radixsort(int arr[], int n)
+{
+    // Find the maximum number to know number of digits
+    int m = getMax(arr, n);
+
+    // Do counting sort for every digit. Note that instead
+    // of passing digit number, exp is passed. exp is 10^i
+    // where i is current digit number
+    for (int exp = 1; m / exp > 0; exp *= 10)
+        countSort(arr, n, exp);
+}
+
+// A utility function to print an array
+void print(int arr[], int n)
+{
+    for (int i = 0; i < n; i++)
+        cout << arr[i] << " ";
+}
+
+// Driver Code
+int main()
+{
+    int arr[] = { 170, 45, 75, 90, 802, 24, 2, 66 };
+    int n = sizeof(arr) / sizeof(arr[0]);
+
+      // Function Call
+      radixsort(arr, n);
+    print(arr, n);
+    return 0;
+}