Question

design a C program to control the stock of books of a small bookstore.

Part 1: for the cout, it should be printf(" "); should write like that

When a client orders a book, the system should check if the bookstore has the book in stock. If the bookstore keeps the title and there is enough stock for the order, the system should inform the price per copy to the client, as well as the total price of the purchase. The client orders a book using its code.

If the client confirms the purchase, the system should ask the client’s name and address. (This information will be sent to the shipping system.)

If the bookstore keeps the title, but there is no book in stock, the system should inform the client and register in a file the code of the book and the date that the low stock was detected, so the manager can request to the publisher.

Part 2:

By the manager request, the system should check how many copies of each book are in stock. If a book has only one copy or none, the system should register in a file the code of the book and the date that the low stock was detected, so the manager can request to the publisher. The system will read the title of a book from a file (books.txt), which structure is: bookCode            BookTitle. (Your program will open the file to read. It reads the code, checks if it is the code of the book with no stock. If it is, read the title of the book and display it.)

Use: (parallel) arrays, loops, and files. Use of functions will be counted as extra credit.

Suggestion: Create an array with about 6 codes of books to test your program. The parallel array will be needed to keep the quantity in stock and the price of the book.

Add comments to your program to explain your decisions.

Evaluation:

1. Correct use of arrays and variables.
2. Correct use of loops.
3. Correct use of files.
4. remember to write it in C language

Answer 1

#include<stdio.h>

#include<stdlib.h>

#include<string.h>

#include<time.h>

#define MAX 50 // Maximum record in file

// Function to read file contents and stores it in respective array

// Returns record length with &len call by reference

void readFile(char title[][MAX], int code[], int qty[], float price[], int *len)

{

// Creates a file pointer to open the file BookOrder.txt in read mode

FILE *readF = fopen("BookOrder.txt", "r");

// To store '\n' character

char newLine[3];

// Initializes both the counter to 0

*len = 0;

// Checks if file is unable to open then display error message

if (readF == NULL)

{

// Display error message

puts("Error: Could not open files");

exit(0);

}// End of if

// Extracts data from file and stores it

while (!feof(readF))

{

// Reads a number from file and stores it at len index position

fscanf(readF, "%[^\n]s", title[*len]);

// Reads a number from file and stores it at len index position

fscanf(readF, "%d", &code[*len]);

// Reads a number from file and stores it at len index position

fscanf(readF, "%d", &qty[*len]);

// Reads a number from file and stores it at len index position

fscanf(readF, "%f", &price[*len]);

// Reads '\n' character

fscanf(readF, "%c", &newLine);

// Increase the record counter by one

*len = *len + 1;

}// End of while loop

// Close the file

fclose(readF);

}// End of function

// Function to display all book information

void showBooks(char title[][MAX], int code[], int qty[], float price[], int len)

{

printf("\n ******************* Books Information *******************");

int x;

// Loops till number of records

for(x = 0; x < len; x++)

// Displays each book information

printf("\n\n Title: %s \t Code: %d \n Quantity: %d \t Price: %f",

title[x], code[x], qty[x], price[x]);

}// End of function

// Function to search a book and return found index position otherwise returns -1

int searchBook(char title[][MAX], char name[], int len)

{

int x;

// Loops till number of records

for(x = 0; x < len; x++)

// Checks if current book title is equals to parameter name

if(stricmp(name, title[x]) == 0)

// Returns loop variable value as found index position

return x;

// End of the loop returns -1 for not found

return -1;

}// End of function

// Function to perform transaction

// Writes the data for purchase if stock no available

// Writes the shipping information is book purchased

void transaction(char title[][MAX], int code[], int qty[], float price[], int len)

{

// Creates a file pointer to open the file Shipping.txt in read write

FILE *shippingWrite = fopen("Shipping.txt", "w");

// Creates a file pointer to open the file Purchase.txt in read write

FILE *purchaseWrite = fopen("Purchase.txt", "w");

// Checks if file is unable to open then display error message

if (shippingWrite == NULL || purchaseWrite == NULL)

{

// Display error message

puts("\n ERROR: Unable to open the file for writing.");

exit(0);

}// End of if

// Declaring argument for time()

time_t currentDate;

// Applying time

time (&currentDate);

// To store user choice to continue

char ch;

// To store name and address of client

char name[MAX], address[MAX];

// To store book title to search for purchase

char bookTitle[MAX];

// To store required number of books to purchase

int requiredQty;

// To store found index position of book title

int position;

// Loops till user choice is 'Y' or 'y'

do

{

// Accepts book title

printf("\n\n Enter the title of the book to purchase: ");

gets(bookTitle);

// Calls the function to search book title availability

// Stores the found status

position = searchBook(title, bookTitle, len);

// if found position is not -1 book found

if(position != -1)

{

// Accepts the quantity to purchase

printf("\n Enter the quantity: ");

scanf("%d", &requiredQty);

// Clears console

fflush(stdin);

// Checks if quantity found at index position of book title

// is greater than or equals to required quantity

if(qty[position] >= requiredQty)

{

// Displays the price of found book title

printf("\n Price per copy: $%.2f", price[position]);

// Calculates and displays amount

printf("\n Total price of the purchase: $ %.2f", (qty[position] * price[position]));

// Accepts client conformation for purchase

printf("\n Conform your purchase (y/n)? ");

scanf("%c", &ch);

// Checks if conformation is 'Y' or 'y'

if(ch == 'Y' || ch == 'y')

{

// Accepts the name and address of the client

printf("\n Enter your name: ");

scanf("%s", name);

// Clears console

fflush(stdin);

printf("\n Enter your address: ");

gets(address);

// Writes data to shipping file

fprintf(shippingWrite, "\n Client Name: %s", name);

fprintf(shippingWrite, "\n Address: %s", address);

fprintf(shippingWrite, "\n Book Title: %s", bookTitle);

fprintf(shippingWrite, "\n Quantity: %d", requiredQty);

fprintf(shippingWrite, "\n Unit Price: $%.2f", price[position]);

fprintf(shippingWrite, "\n Amount: $%.2f", (qty[position] * price[position]));

// Subtracts the required quantity from the found book title quantity

qty[position] -= requiredQty;

// Checks if after purchase quantity is 0

if(qty[position] == 0)

{

// Writes data to purchase file

fprintf(purchaseWrite, "\n Book Code: $%d", code[position]);

fprintf(purchaseWrite, "\n Low stock date: %s", ctime(&currentDate));

}

}// End of if condition

}// End of if condition

// Otherwise insufficient stock

else

{

printf("\n Insufficient quantity to purchase. \n Available quantity: %d", qty[position]);

// Writes data to purchase file

fprintf(purchaseWrite, "\n Book Code: $%d", code[position]);

fprintf(purchaseWrite, "\n Low stock date: %s", ctime(&currentDate));

}// End of else

}// End of if condition

// Otherwise book title not available display error message

else

printf("\n Entered book title %s not available in store.", bookTitle);

// Accepts user choice to continue purchase

printf("\n Would you like to purchase another book (y/n)? ");

scanf("%c", &ch);

// Clears console

fflush(stdin);

}while(ch == 'y' || ch == 'y'); // End of do - while loop

}// End of function*/

// main function definition

int main()

{

// Declares a string array of size MAX to store book title

char title[MAX][MAX];

// Declares a integer array of size MAX to store book code

int code[MAX];

// Declares a integer array of size MAX to store quantity

int qty[MAX];

// Declares a double array of size MAX to store price

float price[MAX];

// To store number of records

int len = 0;

// Calls the function to read file

readFile(title, code, qty, price, &len);

// Calls the function to display book information

showBooks(title, code, qty, price, len);

// Calls the function to perform transaction

transaction(title, code, qty, price, len);

return 0;

}// End of main function

Sample Output:

******************* Books Information *******************

Title: C Programming Code: 1111
Quantity: 45 Price: 450.230011

Title: Java Programming Code: 1223
Quantity: 78 Price: 983.369995

Title: Data Structure Code: 3256
Quantity: 78 Price: 345.869995

Title: Operating System Code: 4578
Quantity: 10 Price: 312.450012

Title: Database Management System Code: 2233
Quantity: 12 Price: 123.559998

Title: C++ Code: 2123
Quantity: 8 Price: 421.549988

Enter the title of the book to purchase: DS

Entered book title DS not available in store.
Would you like to purchase another book (y/n)? y

Enter the title of the book to purchase: C++

Enter the quantity: 12

Insufficient quantity to purchase.
Available quantity: 8
Would you like to purchase another book (y/n)? y

Enter the title of the book to purchase: C++

Enter the quantity: 3

Price per copy: $421.55
Total price of the purchase: $ 3372.40
Conform your purchase (y/n)? y

Enter your name: Pyari

Enter your address: BAM

Would you like to purchase another book (y/n)? y

Enter the title of the book to purchase: Operating System

Enter the quantity: 12

Insufficient quantity to purchase.
Available quantity: 10
Would you like to purchase another book (y/n)? y

Enter the title of the book to purchase: Operating System

Enter the quantity: 8

Price per copy: $312.45
Total price of the purchase: $ 3124.50
Conform your purchase (y/n)? n

Would you like to purchase another book (y/n)?n

BookOrder.txt file contents

C Programming
1111
45
450.23
Java Programming
1223
78
983.37
Data Structure
3256
78
345.87
Operating System
4578
10
312.45
Database Management System
2233
12
123.56
C++
2123
8
421.55

Purchase.txt file contents

Book Code: $2123
Low stock date: Tue Apr 23 14:21:27 2019

Book Code: $4578
Low stock date: Tue Apr 23 14:21:27 2019

Shipping.txt file contents

Client Name: Pyari
Address: BAM
Book Title: C++
Quantity: 3
Unit Price: $421.55
Amount: $3372.40