GAME: Library Management System

// C program for the E-library
// Management System
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

// Create Structure of Library
struct library {
    char book_name[20];
    char author[20];
    int pages;
    float price;
};

// Driver Code
int main()
{
    // Create a instance
    struct library lib[100];

    char ar_nm[30], bk_nm[30];

    // Keep the track of the number of
    // of books available in the library
    int i, input, count;

    i = input = count = 0;

    // Iterate the loop
    while (input != 5) {

        printf("\n\n********######"
            "WELCOME TO E-LIBRARY "
            "#####********\n");
        printf("\n\n1. Add book infor"
            "mation\n2. Display "
            "book information\n");
        printf("3. List all books of "
            "given author\n");
        printf(
            "4. List the count of book"
            "s in the library\n");
        printf("5. Exit");

        // Enter the book details
        printf("\n\nEnter one of "
            "the above: ");
        scanf("%d", &input);

        // Process the input
        switch (input) {

        // Add book
        case 1:

            printf("Enter book name = ");
            scanf("%s", lib[i].book_name);

            printf("Enter author name = ");
            scanf("%s", lib[i].author);

            printf("Enter pages = ");
            scanf("%d", &lib[i].pages);

            printf("Enter price = ");
            scanf("%f", &lib[i].price);
            count++;

            break;

        // Print book information
        case 2:
            printf("you have entered"
                " the following "
                "information\n");
            for (i = 0; i < count; i++) {

                printf("book name = %s",
                    lib[i].book_name);

                printf("\t author name = %s",
                    lib[i].author);

                printf("\t pages = %d",
                    lib[i].pages);

                printf("\t price = %f",
                    lib[i].price);
            }
            break;

        // Take the author name as input
        case 3:
            printf("Enter author name : ");
            scanf("%s", ar_nm);
            for (i = 0; i < count; i++) {

                if (strcmp(ar_nm,
                        lib[i].author)
                    == 0)
                    printf("%s %s %d %f",
                        lib[i].book_name,
                        lib[i].author,
                        lib[i].pages,
                        lib[i].price);
            }
            break;

        // Print total count
        case 4:
            printf("\n No of books in "
                "brary : %d",
                count);
            break;
        case 5:
            exit(0);
        }
    }
    return 0;
}