🩸 Blood Bank Management System

A console-based Blood Bank Management System built in C++, using file handling to manage donor records and blood unit inventory. Developed as a first-semester academic project.

📋 Overview

The system is split into two main sections — Donor Management and Blood Stock Management — and performs full CRUD (Create, Read, Update, Delete) operations using flat text files for persistent storage.

✨ Features

Donor Section

• Add Donor — Records Donor ID, First Name, Last Name, Blood Group, and Contact Number
• Update Donor — Look up a donor by ID and update First Name, Last Name, Blood Group, or Contact
• Delete Donor — Look up a donor by ID, display the record, and delete it after confirmation
• Show All Donors — Displays every donor record currently stored

Blood Section

• Add Units — Adds blood units for a given blood group to the stock file
• Available Units — Looks up and displays the available unit count for a given blood group
• Donate Units — Deducts units from stock when blood is issued/donated, updating the file accordingly

Program Flow

Main Menu
│
├── Donor Section
│   ├── Add Donor
│   ├── Update Donor
│   ├── Delete Donor
│   ├── Show All Donors
│   └── Exit
│
├── Blood Section
│   ├── Add Units
│   ├── Available Units
│   ├── Donate Units
│   └── Exit
│
└── Exit Program

📸 Demo Walkthrough

Below is a step-by-step walkthrough of the program in action, with a screenshot for each operation.

1. Main Menu

The program starts by displaying the main menu, letting the user choose between the Donor Section and Blood Section.

2. Add Donor

Adds a new donor by collecting their ID, name, blood group, and contact number, then saves the record to AddDonorDetails.txt.

3. Show All Donors

Displays every donor record currently stored in the system.

4. Update Donor

Looks up a donor by ID and lets the user update their first name, last name, blood group, or contact number.

5. Delete Donor

Looks up a donor by ID, displays the record, and removes it after confirmation.

6. Add Units

Adds blood units for a specified blood group to the stock file.

7. Available Units

Checks and displays the number of available units for a given blood group.

8. Donate Units

Deducts units from stock when blood is donated/issued, updating the blood unit file.

9. Exit Program

Asks for confirmation before exiting, or returns to the main menu.

📁 All screenshots are stored in the screenshots/ folder of this repository.

🗂️ Data Storage

The program uses flat text files instead of a database:

File	Purpose
AddDonorDetails.txt	Stores all donor records
AddUnitDetails.txt	Stores blood group unit counts
temp.txt	Temporary file used during update/delete operations

🧱 Data Structure

struct Donor
{
    int id;
    string firstName;
    string lastName;
    string bloodGroup;
    string contact;
};

🛠️ Concepts Demonstrated

• Functions & modular program design
• Structures (struct)
• Switch statements & loops for menu navigation
• File handling (read/write/append)
• String streams (stringstream) for data parsing
• CRUD operations (Create, Read, Update, Delete)
• Menu-driven program architecture

▶️ How to Run

1. Compile the source file using any standard C++ compiler:

   g++ BloodBank.cpp -o BloodBank
   

2. Run the executable:

   ./BloodBank
   

3. On first run, the program will create AddDonorDetails.txt and AddUnitDetails.txt automatically as records are added.
4. Navigate using the on-screen numeric menu options.

Originally developed and tested using Turbo C++ / Dev C++ in a Windows lab environment as part of a first-semester coursework assignment.

📌 Sample Menu

1- Donor Section
2- Blood Section
3- Exit From Program

🎓 About

This project was built during my first semester of the BS Computer Science program at the University of Gujrat, as an introduction to structured programming, file handling, and CRUD-based application design in C++.