while(selection >=1 && selection <=4)
        {
            cout<<"Invalid choice -- please re-enter "<<endl;
            cin>>selection;
        }
        cout << "You have selected option number " << selection<<endl;
        cout<<"How many cups would you like? "<<endl;
        cin>>number;
        number = beverage * number;

     switch(number)
        {
            case 1: cost = number * 15.00;
            cout<<"The total cost is R"<<cost<<endl;
            break;
            case 2: cost = number * 12.50;
             cout<<"The total cost is R"<<cost<<" a cup. "<<endl;
             break;
              case 3: cost = number * 17.00;
             cout<<"The total cost is R"<<cost<<" a cup. "<<endl;
             break;
            case 4: cost = number * 22.50;
             cout<<"The total cost is R"<<cost<<" a cup. "<<endl;
             break;
              case 0:
             cout<<"Please come again "<<endl;
             break;
             default:
             cout<<"Invalid Selection "
             <<" Try again please!!! "<<endl;
        }
return 0;