Simple C Program On Library Management

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How to Write a Simple C Program on Library Management

Library management is a common task that involves keeping track of books, borrowers, and transactions in a library. A simple C program can help you perform this task efficiently and easily. In this article, we will show you how to write a simple C program on library management using basic concepts such as arrays, structures, functions, and files.

Steps to Write a Simple C Program on Library Management

To write a simple C program on library management, you need to follow these steps:

Define the data structures for books, borrowers, and transactions. You can use arrays of structures to store the information of each entity. For example, you can define a structure for books as follows:

struct book {

int id; // book id

char title[50]; // book title

char author[50]; // book author

int copies; // number of copies available

};

Declare the global variables and constants for the program. You can use macros to define the constants such as the maximum number of books, borrowers, and transactions. You can also declare the arrays of structures as global variables so that they can be accessed by any function in the program. For example, you can declare the global variables and constants as follows:

#define MAX_BOOKS 100 // maximum number of books

#define MAX_BORROWERS 50 // maximum number of borrowers

#define MAX_TRANSACTIONS 200 // maximum number of transactions

struct book books[MAX_BOOKS]; // array of books

struct borrower borrowers[MAX_BORROWERS]; // array of borrowers

struct transaction transactions[MAX_TRANSACTIONS]; // array of transactions

int book_count = 0; // number of books in the library

int borrower_count = 0; // number of borrowers in the library

int transaction_count = 0; // number of transactions in the library

Write the functions for the main operations of the program. You can write functions for adding, deleting, searching, displaying, and modifying books, borrowers, and transactions. You can also write functions for issuing and returning books. You can use file operations to read and write the data from and to a text file. For example, you can write a function for adding a book as follows:

void add_book() {

struct book b; // temporary variable to store book details

FILE *fp; // file pointer

// open the file in append mode

fp = fopen("books.txt", "a");

// check if the file is opened successfully

if (fp == NULL) {

printf("Error opening file.\n");

return;

}

// check if the library is full

if (book_count == MAX_BOOKS) {

printf("Library is full. Cannot add more books.\n");

return;

}

// get the book details from the user

printf("Enter book id: ");

scanf("%d", &b.id);

printf("Enter book title: ");

scanf("%s", b.title);

printf("Enter book author: ");

scanf("%s", b.author);

printf("Enter number of copies: ");

scanf("%d", &b.copies);

// write the book details to the file

fprintf(fp, "%d %s %s %d\n", b.id, b.title, b.author, b.copies);

// close the file

fclose(fp);

// add the book to the array

books[book_count] = b;

// increment the book count

book_count++;

// display a success message

printf("Book added successfully.\n");

}

Write the main function for the program. You can use a switch-case statement to display a menu of options for the user and call the appropriate functions based on the user's choice. You can also use a loop to repeat the menu until the user exits the program. For example, you can write the main function as follows:

int main() {

int choice; // variable to store user's choice

// display a welcome message

printf("Welcome to Library Management System.\n");

// read the data from the file

read_data();

// repeat until user exits

do {

// display a menu of options

printf("\nMenu:\n"); 66dfd1ed39

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