more algo in issue #1

C++/PigeonholeSort.cpp

@@ -0,0 +1,41 @@
+#include<iostream>
+#include<vector>
+using namespace std;
+
+void pigeonhole_sort(int arr[],int n)
+{
+	int minm=arr[0],maxm=arr[0];
+	for(int i=1;i<n;i++)
+	{
+		if(arr[i]<minm)
+		minm=arr[i];
+		if(arr[i]>maxm)
+		maxm=arr[i];
+	}
+	int range=maxm-minm+1;
+	vector<int>holes[range];
+	for(int i=0;i<n;i++)
+	holes[arr[i]-minm].push_back(arr[i]);
+	int index=0;
+	for(int i=0;i<range;i++)
+	{
+		for(auto it:holes[i])
+		arr[index++]=it;
+	}
+}	
+
+int main()
+{
+	int n;
+	cout<<"Enter the size of array : ";
+	cin>>n;
+	int arr[n];
+	cout<<"Enter elements of the array : ";
+	for(int i=0;i<n;i++)
+	cin>>arr[i];
+	pigeonhole_sort(arr,n);
+	cout<<"Sorted array is : "<<endl;
+	for(int i=0;i<n;i++)
+	cout<<arr[i]<<" ";
+	return 0;
+}

README.md

@@ -1,11 +1,11 @@
-# Sorting Algorithms
+# Sorting Algorithms
 _Sorting algorithms implemented in different languages (for hacktoberfest_ 😃_). This repository is open to everyone. Feel free to add any sorting algorithms. The instructions for how to contribute to this repo are down below._
 
 ## List of Algorithms ⌨️
 | Language | Algorithms |
 |----------|------------|
 | Assembly | [`Bubble Sort`](Assembly/bubblesort.asm) [`Quick Sort`](Assembly/quicksort.asm)
-| C++ | [`Interchange Sort`](C++/InterchangeSort.cpp ) [`Bubble Sort`](C++/BubbleSort.cpp) [`Heap Sort`](C++/HeapSort.cpp) <br> [`Insertion Sort`](C++/InsertionSort.cpp) [`Merge Sort`](C++/MergeSort.cpp) [`Quick Sort`](C++/QuickSort.cpp) <br> [`Selection Sort`](C++/SelectionSort.cpp) [`Shell Sort`](C++/ShellSort.cpp) [`Binary Insertion Sort`](C++/BinaryInsertionSort.cpp) <br> [`Bucket Sort`](C++/BucketSort.cpp) [`Cycle Sort`](C++/cycleSort.cpp) [`K Way Merge Sort`](C++/) <br> [`Radix Sort`](C++/RadixSort.cpp) [`Tree Sort`](C++/treeSort.cpp) |
+| C++ | [`Interchange Sort`](C++/InterchangeSort.cpp ) [`Bubble Sort`](C++/BubbleSort.cpp) [`Heap Sort`](C++/HeapSort.cpp) <br> [`Insertion Sort`](C++/InsertionSort.cpp) [`Merge Sort`](C++/MergeSort.cpp) [`Quick Sort`](C++/QuickSort.cpp) <br> [`Selection Sort`](C++/SelectionSort.cpp) [`Shell Sort`](C++/ShellSort.cpp) [`Binary Insertion Sort`](C++/BinaryInsertionSort.cpp) <br> [`Bucket Sort`](C++/BucketSort.cpp) [`Cycle Sort`](C++/cycleSort.cpp) [`K Way Merge Sort`](C++/) <br> [`Radix Sort`](C++/RadixSort.cpp) [`Tree Sort`](C++/treeSort.cpp) [`PigeonholeSort`](C++/PigeonholeSort.cpp) |
 | C | [`Bubble Sort`](C/BubbleSort.c) [`Insertion Sort`](C/InsertionSort.c) [`Merge Sort`](C/MergeSort.c) <br> [`Quick Sort`](C/QuickSort.c) [`Selection Sort`](C/SelectionSort.c)  [`Bubble Sort #2`](C/Bubble-Sort.c) <br>[`Gnome Sort`](C/gnomesort.c) [`Heap Sort`](C/heapsort.c) [`Radix Sort`](C/radixsort.c) <br> [`Tree Sort`](C/treesort.c) |
 | C# | [`Bubble Sort`](C#/BubbleSort.cs) [`Binary Insertion Sort`](C#/BinaryInsertionSort.cs) [`Heap Sort`](C#/HeapSort.cs) <br> [`Insertion Sort`](C#/InsertionSort.cs) [`Merge Sort`](C#/MergeSort.cs) [`Quick Sort`](C#/QuickSort.cs) <br> [`Selection Sort`](C#/SelectionSort.cs) [`Shell Sort`](C#/ShellSort.cs) |
 | Go | [`Radix Sort`](Go/RadixSort.go) [`Bubble Sort`](Go/BubbleSort.go) [`Insertion Sort`](Go/InsertionSort.go)|