Added a implementation of a Double ended Queue

data_structures/Double_Ended_Queue.cpp

@@ -0,0 +1,81 @@
+/*Author Alok Khulbay
+Date:12/10/2020.
+*/
+#include <iostream>
+#include <deque>
+#include <string>
+#include <cstdlib>
+#include <conio.h>
+using namespace std;
+int main()
+{
+    deque<int> d;
+    deque<int>::iterator it;
+    int c, item;
+    while (1)
+    {
+        cout << "1.Size of the Deque" << endl;
+        cout << "2.Insert Element at the End" << endl;
+        cout << "3.Insert Element at the Front" << endl;
+        cout << "4.Delete Element at the End" << endl;
+        cout << "5.Delete Element at the Front" << endl;
+        cout << "6.Front Element at the Deque" << endl;
+        cout << "7.Last Element at the Deque" << endl;
+        cout << "8.Display Deque" << endl;
+        cout << "9.Exit" << endl;
+        cout << "Enter your choice:";
+        cin >> c;
+        switch (c)
+        {
+        case 1:
+            cout << "Size of the Deque: " << d.size() << endl;
+            break;
+        case 2:
+            cout << "Enter value to be inserted at the End: " << endl;
+            cin >> item;
+            d.push_back(item);
+            break;
+        case 3:
+            cout << "Enter value to be inserted at the Front: " << endl;
+            cin >> item;
+            d.push_front(item);
+            break;
+        case 4:
+            item = d.back();
+            d.pop_back();
+            cout << "Element " << item << " Deleted" << endl;
+            break;
+        case 5:
+            item = d.front();
+            d.pop_front();
+            cout << "Element " << item << "Deleted" << endl;
+            break;
+        case 6:
+            cout << "Front Element of the Deque is: ";
+            cout << d.front() << endl;
+            break;
+        case 7:
+            cout << "Back Element of the Deque is: ";
+            cout << d.back() << endl;
+            break;
+        case 8:
+            cout << "Elements of Deque: ";
+            for (it = d.begin(); it != d.end(); it++)
+            {
+                cout << *it << " ";
+                cout << endl;
+            }
+            break;
+        case 9:
+            exit(1);
+            break;
+
+        default:
+            cout << "Wrong Choice" << endl;
+        }
+        cout << "Press any key>>>>>>" << endl;
+        getchar();
+        getche();
+    }
+    return 0;
+}