Book details in C: Finding most expensive and lowest priced books

Last update on August 01 2025 13:02:59 (UTC/GMT +8 hours)

3. Book Structure Management

Create a structure named Book to store book details like title, author, and price. Write a C program to input details for three books, find the most expensive and the lowest priced books, and display their information.

Sample Solution:

C Code:

#include <stdio.h>
#include <float.h> // Include for FLT_MAX and FLT_MIN constants

// Define the structure "Book"
struct Book {
    char title[100];
    char author[100];
    float price;
};

int main() {
    // Declare variables to store details for three books
    struct Book book1, book2, book3;

    // Input details for the first book
    printf("Input details for Book 1:\n");
    printf("Title: ");
    scanf("%s", book1.title); // Assuming titles do not contain spaces
    printf("Author: ");
    scanf("%s", book1.author); // Assuming authors do not contain spaces
    printf("Price: ");
    scanf("%f", &book1.price);

    // Input details for the second book
    printf("\nInput details for Book 2:\n");
    printf("Title: ");
    scanf("%s", book2.title);
    printf("Author: ");
    scanf("%s", book2.author);
    printf("Price: ");
    scanf("%f", &book2.price);

    // Input details for the third book
    printf("\nInput details for Book 3:\n");
    printf("Title: ");
    scanf("%s", book3.title);
    printf("Author: ");
    scanf("%s", book3.author);
    printf("Price: ");
    scanf("%f", &book3.price);

    // Find the most expensive book
    struct Book mostExpensive;
    if (book1.price >= book2.price && book1.price >= book3.price) {
        mostExpensive = book1;
    } else if (book2.price >= book1.price && book2.price >= book3.price) {
        mostExpensive = book2;
    } else {
        mostExpensive = book3;
    }

    // Find the lowest priced book
    struct Book lowestPriced;
    if (book1.price <= book2.price && book1.price <= book3.price) {
        lowestPriced = book1;
    } else if (book2.price <= book1.price && book2.price <= book3.price) {
        lowestPriced = book2;
    } else {
        lowestPriced = book3;
    }

    // Display information for the most expensive book
    printf("\nMost Expensive Book:\n");
    printf("Title: %s\n", mostExpensive.title);
    printf("Author: %s\n", mostExpensive.author);
    printf("Price: %.2f\n", mostExpensive.price);

    // Display information for the lowest priced book
    printf("\nLowest Priced Book:\n");
    printf("Title: %s\n", lowestPriced.title);
    printf("Author: %s\n", lowestPriced.author);
    printf("Price: %.2f\n", lowestPriced.price);

    return 0;
}

Output:

Input details for Book 1:
Title: Book-1
Author: Author-1
Price: 100

Input details for Book 2:
Title: Book-2
Author: Author-2
Price: 120

Input details for Book 3:
Title: Book-3
Author: Author-3
Price: 111

Most Expensive Book:
Title: Book-2
Author: Author-2
Price: 120.00

Lowest Priced Book:
Title: Book-1
Author: Author-1
Price: 100.00

Explanation:

In the exercise above,

The Book structure is defined with members title, author, and price.
Three variables (book1, book2, and book3) are declared to store details for three books.
The program prompts the user to input details for each book.
It then finds the most expensive and lowest priced books.
Finally, it displays information for both the most expensive and lowest priced books.

Flowchart:

Flowchart: Book details in C: Finding most expensive and lowest priced books.

For more Practice: Solve these Related Problems:

Write a C program to input details for three books, then display them sorted by price in descending order.
Write a C program to store book details in an array of structures, search for a book by title, and display its information.
Write a C program to input book details, compute the average price, and list all books priced above the average.
Write a C program to input details for a set of books and update the price of any book below a threshold, then display the updated list.

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