Dequeue Using STL List, C++ (vc++)

Dequeue Using STL List

/*
 * C++ Program to Implement Dequeue using List Stl
 */
#include <iostream>
#include <list>
#include <string>
#include <cstdlib>

using namespace std;

int main()
{
    int myints[] = {5, 6, 3, 2, 7};
    list<int> l, l1 (myints, myints + sizeof(myints) / sizeof(int));
    list<int>::iterator it;
    int choice, item;
    while (1)
    {
        cout<<"\n---------------------"<<endl;
        cout<<"Dequeue using STL List"<<endl;
        cout<<"\n---------------------"<<endl;
        cout<<"1.Insert Element at the Front of Dequeue"<<endl;
        cout<<"2.Insert Element at the End of Dequeue"<<endl;
        cout<<"3.Delete Element from the Front of Dequeue"<<endl;
        cout<<"4.Delete Element from the End of Dequeue"<<endl;
        cout<<"5.Front Element of Dequeue"<<endl;
        cout<<"6.Last Element of the Dequeue"<<endl;
	cout<<"7. Elements of Dequeue are:"<<endl;

cout<<"Enter your Choice: ";
        cin>>choice;
        switch(choice)
        {
        case 1:
            cout<<"Enter value to be inserted at the front: ";
            cin>>item;
            l.push_front(item);
            break;
        case 2:
            cout<<"Enter value to be inserted at the end: ";
            cin>>item;
            l.push_back(item);
            break;
        case 3:
            item = l.front();
            l.pop_front();
	    cout<<"Element "<<item<<" deleted"<<endl;
            break;
        case 4:
            item = l.back();
            l.pop_back();
	    cout<<"Element "<<item<<" deleted"<<endl;
            break;
        case 5:
	    cout<<"Front Element of the Dequeue: ";
	    cout<<l.front()<<endl;
            break;
        case 6:
            cout<<"Last Element of the Dequeue: ";
            cout<<l.back()<<endl;
            break;
        case 7:
            cout<<"Elements of the List:  ";
            for (it = l.begin(); it != l.end(); it++)
                cout<<*it<<"  ";
            cout<<endl;
            break;
	
        default:
            cout<<"Wrong Choice"<<endl;
        }
    }
    return 0;
}


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