In this article, we will implement a simple book management system using the C programming language. This system will allow users to add, view, and delete book information. We will use structures to store book data and file operations to persist the data.
1. System Requirements Analysis
Our book management system needs to have the following basic functionalities:
- Add new books
- View all books
- Delete specified books
- Save and load data to and from files
2. Database Design
We will use a structure <span>Book</span> to represent the information of a book, which includes the following fields:
typedef struct { int id; // Book ID char title[100]; // Book title char author[50]; // Author name} Book;Additionally, we need to define some constants, such as the maximum number of books and the filename.
#define MAX_BOOKS 100 // Maximum number of books supported#define FILENAME "books.dat" // Filename for data storage3. Function Implementation
Next, we will gradually implement each functional module.
3.1 Adding New Books
First, we will implement the function to add new books, <span>addBook</span>:
void addBook(Book *books, int *count) { if (*count >= MAX_BOOKS) { printf("Cannot add more books.\n"); return; } Book newBook; printf("Please enter the book ID: "); scanf("%d", &newBook.id); printf("Please enter the book title: "); getchar(); // Clear the newline character from the input buffer fgets(newBook.title, sizeof(newBook.title), stdin); printf("Please enter the author's name: "); fgets(newBook.author, sizeof(newBook.author), stdin);