luc083.c

Metadata

• Author — Amit Dutta
• Last updated — 08 Feb 2026
• License — MIT License (See the LICENSE file for details)

Problem Statement

Problem Statement

Library menu-driven program (Add, Display, List by Author, List by Title, Count, List sorted).

Source Code

View on GitHub Download Raw

Printing the code

To print this file, open it on GitHub and click Raw before printing, or use the Download Raw button above and print directly from that page.

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

struct library
{
    int acc_no;
    char title[50];
    char author[50];
    float price;
    int is_issued; // 1 = Yes, 0 = No
};

void add_book(struct library *lib, int *count);
void display_books(struct library *lib, int count);
void list_by_author(struct library *lib, int count);
void list_title_by_acc(struct library *lib, int count);
void sort_by_acc(struct library *lib, int count);

int main()
{
    struct library books[100];
    int count = 0;
    int choice;

    while (1)
    {
        printf("\n--- Library Menu ---\n");
        printf("1. Add Book Info\n");
        printf("2. Display Book Info\n");
        printf("3. List books of given author\n");
        printf("4. List title of specified accession number\n");
        printf("5. List count of books\n");
        printf("6. List books in order of accession number\n");
        printf("7. Exit\n");
        printf("Enter choice: ");
        scanf("%d", &choice);

        switch (choice)
        {
        case 1: add_book(books, &count); break;
        case 2: display_books(books, count); break;
        case 3: list_by_author(books, count); break;
        case 4: list_title_by_acc(books, count); break;
        case 5: printf("Total books in library: %d\n", count); break;
        case 6: sort_by_acc(books, count); display_books(books, count); break;
        case 7: exit(0);
        default: printf("Invalid choice!\n");
        }
    }
    return 0;
}

void add_book(struct library *lib, int *count)
{
    printf("Enter Accession No, Title, Author, Price, Issued(1/0):\n");
    scanf("%d", &lib[*count].acc_no);
    scanf("%s", lib[*count].title); // Using %s for simplicity (no spaces)
    scanf("%s", lib[*count].author);
    scanf("%f", &lib[*count].price);
    scanf("%d", &lib[*count].is_issued);
    (*count)++;
}

void display_books(struct library *lib, int count)
{
    int i;
    for (i = 0; i < count; i++)
        printf("%d: %s by %s ($%.2f) Issued: %d\n", 
               lib[i].acc_no, lib[i].title, lib[i].author, lib[i].price, lib[i].is_issued);
}

void list_by_author(struct library *lib, int count)
{
    char author[50];
    int i, found = 0;
    printf("Enter author name: ");
    scanf("%s", author);
    for (i = 0; i < count; i++)
    {
        if (strcmp(lib[i].author, author) == 0)
        {
            printf("%s\n", lib[i].title);
            found = 1;
        }
    }
    if (!found) printf("No books found.\n");
}

void list_title_by_acc(struct library *lib, int count)
{
    int acc, i;
    printf("Enter Accession No: ");
    scanf("%d", &acc);
    for (i = 0; i < count; i++)
    {
        if (lib[i].acc_no == acc)
        {
            printf("Title: %s\n", lib[i].title);
            return;
        }
    }
    printf("Book not found.\n");
}

void sort_by_acc(struct library *lib, int count)
{
    struct library temp;
    int i, j;
    for (i = 0; i < count - 1; i++)
    {
        for (j = 0; j < count - i - 1; j++)
        {
            if (lib[j].acc_no > lib[j + 1].acc_no)
            {
                temp = lib[j];
                lib[j] = lib[j + 1];
                lib[j + 1] = temp;
            }
        }
    }
}