E -Library Management System - GeeksforGeeks

15 Mar, 2021
In this article, we will discuss the approach to create an E-Library Management System where the user has the following options:
Add book information.
Display book information.
To list all books of a given author.
To list the count of books in the library.
Functionalities Required:
If the user tries to add a book then the user must have to provide the below specific Information about the book as:Enter Book Name:Enter Author Name:Enter Pages:Enter Price:
Enter Book Name:
Enter Author Name:
Enter Pages:
Enter Price:
When the user tries to display all books of a particular author then the user must have to enter the name of the author:Enter the author name:
Enter the author name:
The E-Library management System must be also capable of counting all the books available in the library.
Below is the program to implement the E-Library Management System:
C
// C program for the E-library// Management System#include <stdio.h>#include <stdlib.h>#include <string.h>  // Create Structure of Librarystruct library {    char book_name[20];    char author[20];    int pages;    float price;};  // Driver Codeint 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;}
Output:
Displaying the functoionalities and input for option 1:
For Choice 2 and 3:
For choice 4 and 5:
Binary Tree
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