Supply Chain & Logistics Management System

A menu-driven supply chain logistics simulator built in C++ for our 2nd semester Object Oriented Programming course at FAST-NUCES Karachi.

Features

• Create and manage shipment orders.
• Load cargo crates onto transport vehicles (trucks, planes, ships, drones).
• Dispatch shipments and track their status with calculated transit times.
• Run customs audits for international shipments (checks for hazmat and fragile rules).
• Save and load the system state to text files using custom File I/O.

How It Works

The program runs in a command-line loop. You start by adding some vehicles to your fleet. Once you have a fleet, you can create cargo crates and assign them to shipment orders.

When you try to load crates onto a vehicle, the system checks several rules. For example, drones can't carry over 50kg per crate, planes can't take hazmat materials, and ships can't take fragile items. If a rule is broken, it blocks the load. When you dispatch a shipment, it calculates the transit time based on the vehicle's speed and the distance. We also added a customs auditor for international orders that flags banned materials and calculates tariffs. You can save all your active data to text files and load it back up later.

OOP Concepts Used

• Inheritance: GroundTransport, AirTransport, and WaterTransport inherit from an abstract TransportAsset base class. We also used multiple virtual inheritance for the HeavyLiftDrone so it can act as both air and ground transport without hitting the diamond problem.
• Polymorphism: We used pure virtual functions (like calculateTransitTime() and loadCrate()) so each vehicle type runs its own specific logic.
• Templates: Instead of relying on <vector>, we built a custom Registry<T> template class to manage our dynamic arrays of pointers.
• Exception Handling: We made a custom exception hierarchy starting with LogisticsException to handle things like exceeding payload capacity or violating cargo rules.
• Operator Overloading: We overloaded operator+ to handle capacity checks when loading crates, and operator[] for easy array indexing.
• Friend Classes: The CustomsAuditor is a friend class to ShipmentOrder, which lets it check the private crate arrays directly without opening up security holes with public setters.

How to Run

1. Compile: Open your terminal (VS Code Terminal, Command Prompt, or PowerShell) and run: g++ Main.cpp Assets.cpp Logistics.cpp -o Logistics
2. Run on Windows (Default): In that same terminal, execute the program by typing Logistics.exe (if using Command Prompt) or .\Logistics.exe (if using PowerShell or VS Code).
3. Run on Linux/macOS: Before compiling, open Main.cpp and replace system("cls") with system("clear"). Then compile and run using ./Logistics.

Made by

@MF4rhan & @farazcmd