Question

Write a discount system for a spa, which provides services and sells products. It offers 3 types of memberships: Premium, Gold and Silver. Premium, gold and silver members receive a discount of 18%, 12%, and 10%, respectively (this might change in future), for all services provided. Customers without membership receive no discount. All members receive a flat 10% discount on products purchased (this might change in future). Your system shall consist of four classes: Customer, Discount, Visit,Product and Services. It shall compute the total bill if a customer purchases $x of products and $y of services, for a visit. Also write a test program to exercise all the services.

Acceptance Criteria

As a user, I should be able to interact with the application interactively.

Note :

1. Use OOP concepts
2. Draw class diagram for the above problem
3. Use any object oriented language(Java/ Python/C++) for program implementation
4. Give the steps clearly to execute the program at our side

Answer 1

This Problem is implemented in c++

Source Code:

#include <iostream>
using namespace std;
class Customer{
  protected: string name;
            int m;
        Customer(){
            m=0;
        }
        public:
        int membership()    // Function that takes value for Membership
        {
            cout<<"1.Premium\n2.Gold\n3.Silver\n4.Without Member ship\n";
            cout<<"Enter your Membership Number : ";
            cin>>m;
            return m;
        }
  
    
};


class ProductAndService     
 {
  protected : int ch,ch2;
  public:
  
  int product()    // Member Function that calculate the total price of product customer want to buy
  {
      double price = 0;
      while(ch!=4){
      cout<<"\n\n--------------------- PRODUCT LIST -------------------\n";
      cout<<"1.Hair Wax($10)\n2.Shampoo($15)\n3.Face Wash($20)\n----------4.Not Want to Buy----------\n";
      cout<<"Enter Product Number:";
      cin>>ch;
      if(ch==1)price+=10;
      else if(ch==2)price+=15;
      else if(ch==3)price+=20;
      }
    return price;   // Return Product Price
  }
  int service(){    // Member Function that calculate Total service price
      double price = 0;
      while(ch2!=6){
        cout<<"\n\n  ------------------- SERVICE LIST----------------------";
      cout<<"\n1.Hair Cutting($5)\n2.Shave($5)\n3.De-tannng($10)\n4.massage($10)\n5.Facial($20)\n-----------6.Not want to buy-----------";
      cout<<"\nEnter your choice:";
      cin>>ch2;
      if(ch2==1)price+=5;
      if(ch2==2)price+=5;
      if(ch2==3)price+=10;
      if(ch2==4)price+=10;
      if(ch2==5)price+=20;
      }
      
      return price;   // Return Service Price
  }
  
  
    
};
/*  Discount Class Inherits the two class publically  
    one is Customer and
    second is ProductAndService
*/

class Discount : public Customer , public ProductAndService  
{
  protected :
            double mDiscount;   // membership Discount
            double FlatDiscount;  // Flat Discount;
            
    public:
            Discount()
            {
               
                FlatDiscount = 10;
            }
            void checkCustomer()   // Check Customer Membership and add membership discount
            {
              int d;
              d = membership();  //Calls Membership function of class Customer
              switch(d){
                  case 1 : mDiscount = 18; break;
                  case 2 : mDiscount =12; break;
                  case 3: mDiscount = 10; break;
                  case 4: mDiscount =0; break;
                  default : mDiscount = 0;
              }
            }
            void CalculateDiscount()
            {   
                checkCustomer();   // Call checkCustomer method
            
                double ProductBill,ServiceBill;
                ProductBill = product();    // calls product() Function of ProductAndService class which return the bill of products
                ServiceBill  = service();  // calls service() Function of ProductAndService class which returns the bill of services
                double TotalBill;
                
                
                //TotalBill = (ProductBill+ServiceBill)*(FlatDiscount/100)*(mDiscount/100);
                TotalBill = ServiceBill +ProductBill;
                double f,m;
                f=(TotalBill*(FlatDiscount/100));
                m = (TotalBill*(mDiscount/100));
                cout<<"\nTotal Bill is $"<<TotalBill;
                cout<<"\nDiscount : $ "<<f;
                cout<<"\nDiscount(Membership) : $"<<m;
                cout<<"\nBill After Discount : $"<<TotalBill - f-m;
                
            }
             
    
};

class visit : public Discount   // Vist class Inherits the Discount class
{
    public:
        void VisitCustomer()
        {
            cout<<"-------------------  Welcome -------------------";
            cout<<"\nMake Sure you enter Correct Choice otherwise program will be stopped and you need to Re-Execute\n";
            CalculateDiscount();  // Calls CalculateDiscount() Function of Discount class for further activities
        }
};

int main()
{
    
    visit v1;    // Declare object of class visit
    char a;
    while(a!='n')
    {
        v1.VisitCustomer();
        cout<<"\nDo you Want to Continue(y/n)";
        cin>>a;
    }
    
    cout<<"--------------- Thankyou For Coming  ---------------\n\n";
    cout<<"--------------- Visit Again ---------------";
    
    return 0;
}

Output:

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Class Diagram:

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If you have any type of error Explain in Comment Section

Thumbs up if you are satisfied.

Thankyou