C++ E-commerce System

Overview

This project is an implementation of an e-commerce system in C++ developed as part of the Fawry Quantum Internship Challenge 3.

Features

• ✅ Product Management: Handle product inventory with expiry dates and stock levels
• ✅ Shopping Cart: Add products to cart with quantity validation
• ✅ Customer Management: Customer balance and payment processing
• ✅ Shipping Service: Calculate shipping fees based on product weight and shipping requirements
• ✅ Checkout System: Complete order processing with receipt generation
• ✅ Error Handling: Validates stock, expiry, and payment capabilities

System Architecture

Classes Overview

Product

• Manages product information (name, price, quantity, expiry, shipping requirements, weight)
• Validates product expiry status
• Tracks inventory levels

CartItem

• Links products with quantities in the shopping cart
• Maintains product references and selected quantities

Cart

• Manages collection of cart items
• Validates product availability and expiry before adding
• Calculates subtotal for all items
• Provides cart status checking

Customer

• Handles customer information and balance management
• Validates payment capability
• Processes payment transactions

ShippingService

• Calculates shipping fees based on product weight
• Generates detailed shipping notices for items requiring shipment
• Handles weight calculations and displays package information

How to Build and Run

Prerequisites

• C++ compiler (g++, clang++, or MSVC)
• C++11 or later standard support

Compilation Options

Option 1: Using g++ directly

g++ -std=c++11 -Wall -Wextra -o ecommerce ecommerce_system.cpp

Option 2: Using the provided Makefile

make

Running the Program

./ecommerce

Sample Output

The program demonstrates a complete checkout process with:

** Shipment notice **
2x Cheese        400g
1x TV        5000g
Total package weight 5.4kg

** Checkout receipt **
2x Cheese        200
1x TV        500
1x Scratch Card        50
----------------------
Subtotal         750
Shipping         30
Amount           780
Customer balance 220

Code Features

• Object-Oriented Design: Clean class structure with proper encapsulation
• Memory Management: Proper pointer usage for cart items
• Input Validation: Comprehensive checks for stock, expiry, and payment
• Modular Design: Separated concerns for different system components
• Error Handling: Graceful handling of various error conditions

Test Scenario

The program includes a test scenario with:

• Customer: John with $1000 initial balance
• Products:
  • Cheese: $100, 10 in stock, 5 days until expiry, 200g weight, requires shipping
  • TV: $500, 5 in stock, no expiry, 5000g weight, requires shipping
  • Scratch Card: $50, 20 in stock, no expiry, 0g weight, no shipping required

Future Enhancements

• Dynamic memory management with vectors
• Database integration for persistent storage
• Multiple shipping options and rates
• Discount and coupon system
• User authentication and multiple customers
• Order history tracking

Author

Abdelhamid Khald

Challenge

Fawry Quantum Internship Challenge 3

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This project demonstrates proficiency in C++ programming, object-oriented design, and e-commerce system architecture.