pc016.c - bsc - Comprehensive codebase and cou...

pc016.c (2442B)
      1 /*
      2  * Author: Amit Dutta (amitdutta4255@gmail.com) | Date: 31 Mar 2026
      3  * Repo: https://github.com/notamitgamer/bsc
      4  * License: MIT
      5  */
      6 
      7 /* Write a c program that records book data from user and stores them in to a file. */
      8 
      9 #include <stdio.h>
     10 #include <stdlib.h>
     11 #include <string.h>
     12 #include <stdbool.h>
     13 
     14 #define FILENAME "Library.txt"
     15 
     16 typedef struct Book
     17 {
     18     int id;
     19     char title[20];
     20     char author[20];
     21 }Book;
     22 
     23 void dataInput(Book *, int);
     24 void displayData(Book *, int);
     25 bool writeLog(Book *, int);
     26 
     27 int main()
     28 {
     29     Book book[3];
     30     int choice;
     31 
     32     printf("== Enter the data ==");
     33     dataInput(book, 3);
     34     printf("\n\n Data enetered by the user ==");
     35     displayData(book, 3);
     36     
     37     if (writeLog(book, 3))
     38     {
     39         printf("\n\nSuccessfully written the log into \"%s\"", FILENAME);
     40         return 0;
     41     } else
     42     {
     43         printf("\nError writing log.");
     44         return 1;
     45     }
     46 }
     47 
     48 void dataInput(Book *book, int n)
     49 {
     50     int i;
     51     char *p;
     52 
     53     for (i = 0; i < n; i++)
     54     {
     55         printf("\nEnter the Book ID: ");
     56         if (scanf("%d", &book[i].id) != 1)
     57         {
     58             printf("\nError reading bookID.");
     59             exit(1);
     60         }
     61         while (getchar() != '\n')
     62             ;
     63 
     64         printf("Enter the Book Title: ");
     65         if (fgets(book[i].title, sizeof(book[i].title), stdin) == NULL)
     66         {
     67             printf("\nError reading title.");
     68             exit(1);
     69         }
     70         p = strchr(book[i].title, '\n');
     71         if (p)
     72             *p = '\0';
     73 
     74         printf("Enter the Book Author: ");
     75         if (fgets(book[i].author, sizeof(book[i].author), stdin) == NULL)
     76         {
     77             printf("\nError reading Author.");
     78             exit(1);
     79         }
     80         p = strchr(book[i].author, '\n');
     81         if (p)
     82             *p = '\0';
     83     }
     84 }
     85 
     86 void displayData(Book *book, int n)
     87 {
     88     int i;
     89     for (i = 0; i < n; i++)
     90     {
     91         printf("\n\nBook ID: %d"
     92                "\nBook Title: %s"
     93                "\nBook Author: %s",
     94                book[i].id, book[i].title, book[i].author);
     95     }
     96 }
     97 
     98 bool writeLog(Book *book, int n)
     99 {
    100     int i;
    101     FILE *output = NULL;
    102     output = fopen(FILENAME, "w");
    103     if (output == NULL)
    104     {
    105         printf("\n\nError writing file \"%s\"", FILENAME);
    106         return false;
    107     }
    108     for (i = 0; i < n; i++)
    109     {
    110         fprintf(output, "%d \'%s\' \'%s\'\n", book[i].id, book[i].title, book[i].author
    111     }
    112     fclose(output);
    113     return true;
    114 }
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