C++ Program to Implement Queue in STL

Code:

#include    iostream
#include    queue
#include    string
#include    cstdlib
using namespace std;
int main()
{
    queue q;
    int choice, item;
    while (1)
    {
        cout<<"\n---------------------"<
        cout<<"Queue Implementation in Stl"<
        cout<<"\n---------------------"<
        cout<<"1.Insert Element into the Queue"<
        cout<<"2.Delete Element from the Queue"<
cout<<"3.Size of the Queue"<
        cout<<"4.Front Element of the Queue"<
        cout<<"5.Last Element of the Queue"<
        cout<<"6.Exit"<
        cout<<"Enter your Choice: ";
        cin>>choice;
        switch(choice)
        {
        case 1:
            cout<<"Enter value to be inserted: ";
            cin>>item;
            q.push(item);
            break;
        case 2:
            item = q.front();
            q.pop();
            cout<<"Element "<
            break;
        case 3:
    cout<<"Size of the Queue: ";
    cout<
            break;
        case 4:
            cout<<"Front Element of the Queue: ";
    cout<
            break;
        case 5:
            cout<<"Back Element of the Queue: ";
            cout<
            break;
        case 6:
            exit(1);
    break;
        default:
            cout<<"Wrong Choice"<
        }
    }
    return 0;
}


Output:

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 1
Enter value to be inserted: 9

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 1 
Enter value to be inserted: 8

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 1
Enter value to be inserted: 7

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 1
Enter value to be inserted: 6

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 1
Enter value to be inserted: 5

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 1
Enter value to be inserted: 4

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 3
Size of the Queue: 6

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 4
Front Element of the Queue: 9

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 5
Back Element of the Queue: 4

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 2
Element 9 Deleted

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 3
Size of the Queue: 5

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 4
Front Element of the Queue: 8

---------------------
Queue Implementation in Stl

---------------------
1.Insert Element into the Queue
2.Delete Element from the Queue
3.Size of the Queue
4.Front Element of the Queue
5.Last Element of the Queue
6.Exit
Enter your Choice: 6


------------------
(program exited with code: 1)
Press return to continue


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