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

pc016.c (2305B)
      1 /* Write a c program that records book data from user and stores them in to a file. */
      2 
      3 #include <stdio.h>
      4 #include <stdlib.h>
      5 #include <string.h>
      6 #include <stdbool.h>
      7 
      8 #define FILENAME "Library.txt"
      9 
     10 typedef struct Book
     11 {
     12     int id;
     13     char title[20];
     14     char author[20];
     15 }Book;
     16 
     17 void dataInput(Book *, int);
     18 void displayData(Book *, int);
     19 bool writeLog(Book *, int);
     20 
     21 int main()
     22 {
     23     Book book[3];
     24     int choice;
     25 
     26     printf("== Enter the data ==");
     27     dataInput(book, 3);
     28     printf("\n\n Data enetered by the user ==");
     29     displayData(book, 3);
     30     
     31     if (writeLog(book, 3))
     32     {
     33         printf("\n\nSuccessfully written the log into \"%s\"", FILENAME);
     34         return 0;
     35     } else
     36     {
     37         printf("\nError writing log.");
     38         return 1;
     39     }
     40 }
     41 
     42 void dataInput(Book *book, int n)
     43 {
     44     int i;
     45     char *p;
     46 
     47     for (i = 0; i < n; i++)
     48     {
     49         printf("\nEnter the Book ID: ");
     50         if (scanf("%d", &book[i].id) != 1)
     51         {
     52             printf("\nError reading bookID.");
     53             exit(1);
     54         }
     55         while (getchar() != '\n')
     56             ;
     57 
     58         printf("Enter the Book Title: ");
     59         if (fgets(book[i].title, sizeof(book[i].title), stdin) == NULL)
     60         {
     61             printf("\nError reading title.");
     62             exit(1);
     63         }
     64         p = strchr(book[i].title, '\n');
     65         if (p)
     66             *p = '\0';
     67 
     68         printf("Enter the Book Author: ");
     69         if (fgets(book[i].author, sizeof(book[i].author), stdin) == NULL)
     70         {
     71             printf("\nError reading Author.");
     72             exit(1);
     73         }
     74         p = strchr(book[i].author, '\n');
     75         if (p)
     76             *p = '\0';
     77     }
     78 }
     79 
     80 void displayData(Book *book, int n)
     81 {
     82     int i;
     83     for (i = 0; i < n; i++)
     84     {
     85         printf("\n\nBook ID: %d"
     86                "\nBook Title: %s"
     87                "\nBook Author: %s",
     88                book[i].id, book[i].title, book[i].author);
     89     }
     90 }
     91 
     92 bool writeLog(Book *book, int n)
     93 {
     94     int i;
     95     FILE *output = NULL;
     96     output = fopen(FILENAME, "w");
     97     if (output == NULL)
     98     {
     99         printf("\n\nError writing file \"%s\"", FILENAME);
    100         return false;
    101     }
    102     for (i = 0; i < n; i++)
    103     {
    104         fprintf(output, "%d \'%s\' \'%s\'\n", book[i].id, book[i].title, book[i].author
    105     }
    106     fclose(output);
    107     return true;
    108 }
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