“BILLING SYSTEM”
A Project
Submitted in partial fulfillment of the requirement for the award of Diploma in
Computer Engineering Discipline
Submitted To
****
MAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION, MUMBAI
(DTE Code: 5009)
Submitted By:
Mr.Aayush Dipak Dhobale Exam Seat No. 464562
Mr.Nitin Manohar Sonawane Exam Seat No. 464573
Mr.Dipraj Himmat Patil Exam Seat No. 464600
Mr.Yogendra Anil Patil Exam Seat No. 464597
Mr.Ravikiran Gulabsing Pawara. Exam Seat No. 464609
Under The Guidance Of:
Prof. M P Vasave
DEPARTMENT OF COMPUTER ENGINEERING
GOVERNMENT POLYTECHNIC,
NANDURBAR, DIST- NANDURBAR (MSBTE CODE: 1432)
1
YEAR 2024-25
2
GOVERNMENT POLYTECHNIC,
NANDURBAR, DIST-NANDURBAR (MSBTE CODE: 1432)
CERTIFICATE
This is to certify that
Mr.Aayush Dipak Dhobale Exam Seat No. 464562
Mr.Nitin Manohar Sonawane Exam Seat No. 464573
Mr.Dipraj Himmat patil Exam Seat No. 464600
Mr.Yogendra Anil Patil Exam Seat No. 464597
Mr.Ravikiran Gulabsing Pawara Exam Seat No. 464609
Has satisfactorily completed project entitled
“ BILLING SYSTEM”
As prescribed by Maharashtra State Board of Technical Education,
Mumbai as a part Of syllabus for the partial fulfillment in Diploma in
Computer Engineering for Academic year 2024-25.
GUIDE H.O.D.
Prof. M P Vasave Prof. S B Thakre
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EXAMINER PRINCIPAL
----------------- Prof.R.C.Gavande
GOVERNMENT POLYTECHNIC,
NANDURBAR, DIST-NANDURBAR (MSBTE CODE: 1432)
CERTIFICATE OF APPROVAL
The Project entitled “Billing System” being submitted by “Aayush Dhobale,
Nitin Sonawane, Dipraj Patil, Yogendra Patil, Ravikiran Pawara” has been
examined by us and is hereby approved for the partial award of Diploma in
Computer Engineering for which it has been submitted. It is understood that by
this approval the undersigned do not necessarily endorse or approve any
statement made, opinion expressed or conclusion drawn therein, but approve the
project only for the purpose for whichit has been submitted.
(Internal Examiner) (External Examiner)
Date:
4
INDEX
Sr no Topic Page no
1 Introduction 5
2 Literature survey 5
3 Analysis 7
4 Requirement analysis 7
5 Estimation summary 8
6 Design 9
7 Flowchart 10
8 Algorithm 11
9 Coding 17
10 Result 19
11 Future scope 21
12 Conclusion 21
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❖ INTRODUCTION:-
A billing system automates the management of billing-related tasks such as generating
invoices, managing payments, and tracking transactions. In businesses like retail shops,
utility companies, and service providers, accurate billing helps maintain customer satisfaction
and prevents revenue loss. This project aims to develop a C++-based billing system that is
user-friendly, reliable, and efficient
❖ LITERATURE SURVEY:-
1. Introduction to Billing Systems
Definition: A billing system is a software application that handles the management of
billing records, invoicing, and payment tracking for a service provider or business.
Importance: Efficient billing systems help automate manual tasks, minimize errors,
increase customer satisfaction, and ensure accurate transaction records.
2. Types of Billing Systems
Retail Billing: Used in retail stores for product invoicing, inventory updates, and sales
tracking.
Utility Billing: Handles complex calculations, billing for water, electricity, etc.
Telecom Billing: Deals with large datasets, service usage, and different customer plans.
3. Objectives of Developing a C++ Billing System
Automating the billing process for speed and accuracy.
Managing customer data (e.g., names, addresses, purchase history).
Reducing the workload for businesses by managing inventory, generating invoices, and
updating records.
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Ensuring secure data handling and providing error-free billing calculations.
4. Existing Solutions and Approaches
Database Integration: Many systems use simple text files or relational databases (like
MySQL or SQLite) to store and retrieve customer and product data.
Object-Oriented Programming (OOP) Principles: C++'s OOP capabilities allow for
encapsulation, inheritance, and polymorphism to build modular, maintainable code
structures.
Graphical User Interfaces (GUIs): Some advanced billing systems integrate GUI
frameworks such as Qt or WxWidgets for better user interactions.
5. Technological Considerations
User Authentication and Security: Implementation of user roles and passwords for
secure access.
Error Handling: Exception handling to prevent crashes and provide user feedback in case
of incorrect inputs.
File Handling: Reading and writing data to files for maintaining purchase records.
6. Challenges Faced in C++ Billing Systems
Complex data validation to ensure correct input.
Managing large databases of items and customers, ensuring fast retrieval.
Integrating real-time updates when multiple users access the system concurrently.
Keeping the system user-friendly for non-technical staff.
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❖ ANALYSIS:-
Statement: Manual billing is error-prone, time-consuming, and inefficient, especially for
larger businesses. This project aims to automate and streamline the billing process.
Proposed Solution: A C++ application that maintains records of products, calculates bills,
generates invoices, tracks payments, and manages customer information, reducing human
errors and increasing efficiency. Problem
❖ REQUIREMENT ANALYSIS:-
• Functional Requirements
Customer Management: Adding, updating, and deleting customer records.
Product Management: Adding, updating, deleting, and viewing product details.
Billing and Invoicing: Generating invoices with itemized billing and managing payment
records.
File Management: Reading and writing data from/to files for storage and retrieval.
• Non-Functional Requirements
Usability: Easy-to-use command-line interface (CLI) or graphical user interface (GUI).
Performance: Quick response times and efficient memory usage.
Security: User authentication and secure handling of sensitive data.
• Tools and Technologies
C++ Compiler: Compatible with various platforms (e.g., GCC, MSVC).
Development Environment: Code::Blocks, Visual Studio, or any C++ IDE.
Database/File Storage: Use of text files, CSV files, or small-scale database systems.
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❖ Estimation summary:-
Sr.no Name of student Work in project
1 Aayush Dipak Dhobale Program developer
2 Dipraj Himmat Patil Report maker
3 Nitin Manohar Sonawane Output checker
4 Yogendra Anil Patil Basic information
5 Rvikiran Gulabsing Pawara Ppt maker
Estimated Timeframe
• Total project duration: 2 weeks
Total Estimated Hours
• For program develop : 48 hours
• For output check : 8 hours
• For report making : 12 hours
• For ppt making : 15 hours
• For all information : 32 hours
Total estimated effort
• Total estimated hours : 115 hours
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❖ DESIGN:-
• System Architecture
The system is divided into modules for easy maintenance:
Customer Management Module: Handles customer data.
Product Management Module: Manages product details and stock.
Billing Module: Calculates bill amounts and generates invoices.
Database/File Management Module: Responsible for storing and retrieving data.
• Class Diagrams
Customer Class: Handles attributes like name, contact, and ID.
Product Class: Manages product details such as ID, name, price, and stock.
Billing Class: Performs billing operations, item addition, calculation, and invoice generation.
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Flowchart :- START
Input : Number of items
Input :Discount Rate
Input : GST Rate
For each Item (loop)
Input item Details
Calculate item cost
Add item cost to total
Calculate discount
Subtract discount from total cost
Calculate GST
Add GST to total cost
Display final bill
End
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❖ Algorithm
1. Create Array (create)
Algorithm:
Prompt the user to enter the size of the array (size).
Loop through size times to read each element of the array from the
user and store it in the array arr.
Time Complexity:
O(n), where n is the size of the array.
---
2. Display Array (display)
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Algorithm:
Print all elements of the array from arr[0] to arr[size-1].
Time Complexity:
O(n), where n is the size of the array.
---
3. Insert Element (insert)
Algorithm:
First, check if the array is full (i.e., size == MAX_SIZE). If the array
is full, print an error message.
Shift elements starting from the last element (arr[size-1]) to the
element at the specified position position, moving each element one
place to the right.
Insert the new element at the given position.
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Increase the array's size by 1 to reflect the new element.
Time Complexity:
O(n), where n is the number of elements in the array (size). In the
worst case, shifting all elements takes O(n) time.
---
4. Delete Element (delete)
Algorithm:
First, check if the position is valid (i.e., position >= 0 and position <
size). If invalid, print an error message.
Shift all elements starting from the element at the position+1 to
arr[size-1] one place to the left, overwriting the element at position.
Decrease the array's size by 1 to reflect the removal of the element.
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Time Complexity:
O(n), where n is the number of elements in the array (size). Shifting
all elements after the deleted element takes O(n) time.
---
5. Selection Sort (selectionSort)
Algorithm:
Loop through the array starting from the first element.
For each element, find the smallest element from the remaining
unsorted portion of the array.
Swap the current element with the smallest found element.
Repeat this process for each element in the array until the entire array
is sorted.
Time Complexity:
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O(n^2), where n is the size of the array. This is because for each
element, the algorithm performs a linear search to find the minimum,
and there are n elements in total.
---
6. Search Element (search)
Algorithm:
Loop through the array and check each element to see if it matches
the given key.
If an element matches the key, return its index.
If the key is not found after checking all elements, return -1.
Time Complexity:
O(n), where n is the size of the array. In the worst case, the algorithm
has to check each element once.
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---
7. Menu and Main Control Loop (main)
The main function provides a menu for the user to select different
operations (create, insert, delete, sort, display, search, exit). It calls the
appropriate functions based on the user’s choice.
Time Complexity:
The complexity depends on which function is chosen by the user. The
main function itself has constant time complexity, O(1), since it only
directs the flow to other functions based on user input.
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❖ CODING:-
#include <iostream>
#include <string>
using namespace std;
// Structure to store product information
struct Product {
string productName;
int productQuantity;
double productPrice;
double gstPercent;
double discountPercent;
};
// Function to display menu
void displayMenu() {
cout << "\nBilling system\n";
cout << " \n";
cout << "1. Add Product\n";
cout << "2. Display Bill\n";
cout << "3. Exit\n";
}
// Function to calculate GST
double calculateGST(double price, double gstPercent)
{
return (price * gstPercent) / 100;
}
// Function to calculate discount
double calculateDiscount(double price, double discountPercent)
{
return ((price * discountPercent) /100);
}
// Function to calculate total price
double calculateTotalPrice(double price, double gst, double discount)
{
return price + gst - discount;
}
// Function to add product
void addProduct(Product &product)
{
cout << "Enter product name: ";
cin.ignore();
getline(cin, product.productName);
cout << "Enter product quantity: ";
cin >> product.productQuantity;
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cout << "Enter product price: ";
cin >> product.productPrice;
cout << "Enter GST percentage: ";
cin >> product.gstPercent;
cout << "Enter discount percentage: ";
cin >> product.discountPercent;
}
// Function to display bill
void displayBill(Product product)
{
double totalPrice = product.productPrice * product.productQuantity;
double gst = calculateGST(totalPrice, product.gstPercent);
double discount = calculateDiscount(totalPrice, product.discountPercent);
double totalAmount = calculateTotalPrice(totalPrice, gst, discount);
cout <<"\n\n\n :******************************:\n";
cout <<" :* RAJMUDRA NASTA HOUSE. * :\n";
cout <<" :******************************:\n";
cout << "\nBill Details:\n";
cout << "Product Name. :~ " << product.productName << "\n";
cout << " " << endl;
cout << "Product Quantity :~ " << product.productQuantity << "\n";
cout << " " << endl;
cout << "Product Price. :~ $" << product.productPrice << "\n";
cout << " " << endl;
cout << "GST (" << product.gstPercent << "%). :~ $" << gst << "\n";
cout << " " << endl;
cout << "Discount (" << product.discountPercent << "%). :~ -$" << discount << "\n";
cout << " " << endl;
cout << "Total Amount. :~ $" << totalAmount << "\n";
cout << " " << endl;
}
int main()
{
Product product;
int choice;
do
{
displayMenu();
cout << "Enter choice: ";
cin >> choice;
switch (choice)
{
case 1:
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addProduct(product);
break;
case 2:
displayBill(product);
break;
case 3:
cout << "Exiting...\n";
break;
default:
cout << "Invalid choice. Please try again.\n";
}
} while (choice != 3);
return 0;
}
❖ RESULT:-
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❖ Future scope
GUI Enhancement: Integrate a graphical user interface using frameworks like Qt for a better
user experience.
Database Integration: Move from simple file storage to database management systems like
SQLite or MySQL for larger-scale data handling.
Mobile Compatibility: Develop a mobile application interface for the system.
Advanced Security Features: Implement role-based access control, data encryption, and
secure user authentication mechanisms.
Analytics and Reporting: Generate detailed business reports and insights based on sales data.
❖ Conclusion:-
The Hotel Billing System in C++ is a comprehensive and efficient program designed to
streamline hotel billing processes. It accurately calculates total bills, applies GST and
discounts, and displays detailed bills.
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