https://github.com/bharath-s-j/digital-due-records

A digital ledger system built in C for managing customer dues, generating bills, and securely maintaining store records.
https://github.com/bharath-s-j/digital-due-records

billing-system c customer-records digital-ledger security store-management

Last synced: 22 days ago
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A digital ledger system built in C for managing customer dues, generating bills, and securely maintaining store records.

• Host: GitHub
• URL: https://github.com/bharath-s-j/digital-due-records
• Owner: Bharath-S-J
• License: mit
• Created: 2025-01-29T18:46:59.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2025-01-29T19:25:13.000Z (over 1 year ago)
• Last Synced: 2025-02-07T11:17:48.173Z (over 1 year ago)
• Topics: billing-system, c, customer-records, digital-ledger, security, store-management
• Language: C
• Homepage:
• Size: 836 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: Readme.md
  • License: LICENSE

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README

          

# 📚 Digital Due Records - Store Management System 🧾 

## 🚀 Overview

**Digital Due Records** is a digital ledger system, developed in **C**, designed to replace traditional "Katha" (account book) systems used in Indian stores. This project streamlines the management of customer dues, generates bills, and maintains well-organized records with minimal effort. It aims to provide an efficient, modern solution for store owners to track and manage financial data securely.

---

## 🌟 Key Features

### 🔐 **Dual Access System**

- **Customer Portal**: Securely view dues and transaction history.

- **Admin Portal**: Password-protected, offering store management capabilities.

### 📝 **Customer Record Management**

- Add, update, and delete customer records.

- Automatic bill generation with real-time due calculations.

- Automatically clear records when dues are settled.

### 🔍 **Advanced Search and Sort**

- **Search by**:

  - Customer name (case-insensitive).

  - Transaction date.

- **Sort records by**:

  - Customer name.

  - Due amount.

  - Transaction date.

- Flexible sorting options with **linked list** implementation, supporting both temporary and permanent sorting.

### 🛡️ **Enhanced Security**

- Password-protected admin access with recovery options.

- Security questions for account recovery.

- Limited login attempts for added protection.

### 💼 **Store Management**

- Customizable store details (name, address, contact).

- Professional bill generation and record management.

- User-friendly interface, requiring no technical knowledge.

---

## 🛠️ Technical Details

### Data Structures:

- **Structures**:

  - `Customer`: Stores customer details and transactions.

  - `SecurityQuestions`: Manages admin credentials securely.

  - `StoreDetails`: Stores essential store-related information.

- **Linked Lists**:

  - Used for dynamic record management.

  - Enables efficient sorting and memory management.

### File Handling:

- **Binary files** for secure and persistent data storage.

- **Text files** for bill generation.

- **Temporary files** for intermediate operations.

### Memory Management:

- **Dynamic memory allocation** using `malloc()`.

- **Proper deallocation** using `free()` to prevent memory leaks.

---

## 🧑‍💻 Skills Demonstrated

### 💡 Programming Concepts:

- Structured Programming.

- Advanced Data Structures (Linked Lists).

- File I/O operations.

- Memory Management.

- Robust Input Validation.

### 🛠️ Software Engineering:

- **Modular Design**: Easily maintainable and extendable codebase.

- **User Interface Design**: Clear, simple, and intuitive interface.

- **Secure Authentication**: Strong user authentication with password and security questions.

- **Error Handling**: Comprehensive error handling and debugging.

### 🧠 Problem Solving:

- Efficient data search and sort algorithms.

- User authentication and security management.

- Real-time due calculations for customers.

---

## ⚙️ Project Setup

### ⚡ Quick Start:

1. Download and run the executable.

2. The first-time setup will guide you through:

   - Admin password creation.

   - Security question configuration.

   - Store details input.

3. Ready to use immediately after setup.

### 🏁 First-Time Setup Process:

1. System creates necessary files:

   - `DueCustomers.txt`: Stores customer records.

   - `password.bin`: Manages admin credentials.

   - `store.txt`: Stores store details.

2. System guides you through:

   - Password creation (minimum 8 characters).

   - Security question setup (4 questions).

3. Validates all inputs to ensure smooth operation.

### 🛠️ Daily Usage:

1. Launch the program.

2. Choose between **Customer** or **Admin** access.

3. Perform actions like adding transactions, viewing records, and generating bills.

---

## 💻 System Requirements:

- **C Compiler** (GCC preferred).

- **Windows OS** or compatible environment.

- Minimum **512MB RAM**.

- **10MB free disk space**.

- No additional software or internet required.

---

## 🚀 Open to Contributions:

This project is open for **collaborations** and **improvements**. Feel free to fork, modify, and enhance the system for your needs or contribute back to the repository. Together, we can make it even better!