Added code for odd-even sort

Computational_Algorithms/Sorting_Algorithms/odd_even_sort.cpp

@@ -0,0 +1,33 @@
+#include<bits/stdc++.h>
+using namespace std;
+void odd_even_sort(vector<int> &arr , int n){
+    bool is_sorted = false;  //initialised a flag to track if array is sorted or not.
+
+    while (!is_sorted)
+    {
+    is_sorted = true; //make flag as sorted initially
+for (int i = 0; i <= n-2; i = i+2) //loop over even elements
+{
+    if(arr[i] >arr[i+1]){
+        swap(arr[i],arr[i+1]); //if next element is smaller than swap the elements 
+        is_sorted = false;//mark the flag as unsorted as we have swapped the elements
+    }
+}
+for (int i = 1; i <= n-2; i = i+2) //loops over odd elements
+{
+    if(arr[i] >arr[i+1]){
+        swap(arr[i],arr[i+1]);//if next element is smaller than swap the elements 
+        is_sorted = false; //mark the flag as unsorted as we have swapped the elements
+    }
+}
+    }
+}
+int main()
+{
+    vector<int> arr ={5 ,2 ,6 ,78 ,8};
+    odd_even_sort(arr , arr.size());
+    for(auto ele : arr){
+        cout<<ele<<endl;
+    }
+    return 0;
+}