Homework SourseFile yuanh include include include include using namespace
// File: yuan.h
#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
struct book
{
int ISBN;
string Author;
string Title;
string publisher;
int Quantity;
double price;
};
void choice1(book books[], int& size, int MAX_SIZE)
{
ifstream inFile;
inFile.open(\"inventory.txt\");
if (inFile.fail())
cout <<\"file could not open\"<<endl;
string str;
while(inFile && size < MAX_SIZE)
{
getline(inFile, str);
books[size].ISBN = atoi(str.c_str());
getline(inFile, books[size].Title);
getline(inFile, books[size].Author);
getline(inFile, books[size].publisher);
getline(inFile, str);
books[size].Quantity = atoi(str.c_str());
getline(inFile, str);
books[size].price = atoi(str.c_str());
getline(inFile, str);
size++;
}
cout << \"You have successfully read the file.\" << endl;
inFile.close();
}
void choice2(book books[], int& size, int MAX_SIZE)
{
if(size < MAX_SIZE)
{
string str;
cout << \"\ Enter the book ISBN: \";
cin >> books[size].ISBN;
cout << \"Enter the author name: \";
cin >> books[size].Author;
cout << \"Enter the book tile: \";
cin >> books[size].Title;
cin.get();
cout << \"Enter the books quantity: \";
cin >> books[size].Quantity;
cout << \"Enter the book price: $\";
cin >> books[size].price;
size++;
cout << \"You have successfully inserted an entry.\" << endl;
}
}
void choice3(book books[], int& size)
{
if(size == 0)
cout << \"Array is empty. Read the data first.\" << endl;
else
{
int isbn;
cout << \"\ Enter the ISBN of the book: \";
cin >> isbn;
for(int i = 0; i < size; i++)
{
if(books[i].ISBN == isbn)
{
int j = i;
while(j < size - 1)
{
books[j] = books[j + 1];
j++;
}
size--;
break;
}
}
cout << \"You have successfully deleted an entry.\" << endl;
}
}
void choice4(book books[], int size)
{
if(size == 0)
cout << \"Array is empty. Read the data first.\" << endl;
else
{
int isbn;
int option;
int qty;
cout << \"\ Enter the ISBN of the book: \";
cin >> isbn;
cout << \"1. Increment\" << endl;
cout << \"2. Decrement\" << endl;
cout << \"3. Add New\" << endl;
cout << \"Enter your option: \";
cin >> option;
cout << \"Enter the quantity: \";
cin >> qty;
for(int i = 0; i < size; i++)
{
if(books[i].ISBN == isbn)
{
if(option == 1)
books[i].Quantity += qty;
else if(option == 2)
{
books[i].Quantity -= qty;
if(books[i].Quantity)
books[i].Quantity = 0;
}
else if(option == 3)
books[i].Quantity = qty;
break;
}
}
cout << \"You have successfully updated the array.\" << endl;
}
}
void choice5(book books[], int size)
{
for(int i = 1; i < size; i++)
{
book current = books[i];
int j = i;
while(j > 0 && (books[j - 1].Title).compare(current.Title) > 0)
{
books[j] = books[j - 1];
j--;
}
books[j] = current;
}
if(size != 0)
cout << \"You have successfully sorted the array.\" << endl;
else
cout << \"Array is empty. Read the data first.\" << endl;
}
void choice6(book books[], int size)
{
for(int i = 0; i < size; i++)
{
cout << endl;
cout << \"Book Number: \" << (i + 1) << endl;
cout << \"ISBN: \" << books[i].ISBN << endl;
cout << \"Author: \" << books[i].Author << endl;
cout << \"Title: \" << books[i].Title << endl;
cout << \"Quantity: \" << books[i].Quantity << endl;
cout << \"Price: $\" << books[i].price << endl;
}
if(size != 0)
cout << \"You have successfully printed the array.\" << endl;
else
cout << \"Array is empty. Read the file first.\" << endl;
}
void choice7(book books[], int size)
{
ofstream outFile;
outFile.open(\"finalData.dat\");
for(int i = 0; i < size; i++)
{
outFile << \"Book Number: \" << (i + 1) << endl;
outFile << \"ISBN: \" << books[i].ISBN << endl;
outFile << \"Author: \" << books[i].Author << endl;
outFile << \"Title: \" << books[i].Title << endl;
outFile << \"Quantity: \" << books[i].Quantity << endl;
outFile << \"Price: $\" << books[i].price << endl << endl;
}
if(size != 0)
cout << \"You have successfully printed the array.\" << endl;
else
cout << \"Array is empty. Read the file first.\" << endl;
outFile.close();
}
// File: Boookstore.cpp
#include<iostream>
#include\"yuan.h\"
using namespace std;
int main()
{
const int MAX_SIZE=100;
int size = 0;
int choice;
book books[MAX_SIZE];
do
{
cout << \"1: Read inventory forn file\" << endl;
cout << \"2: Add an entry\" << endl;
cout << \"3: Delete an entry\" << endl;
cout << \"4: Update an entry\" << endl;
cout << \"5: Sort inventory\" << endl;
cout << \"6: Display Inventory\" << endl;
cout << \"7: Write inventory to file and exit\" << endl;
cout << \"Enter your choice: \";
cin >> choice;
switch(choice)
{
case 1:
choice1(books, size, MAX_SIZE);
break;
case 2:
choice2(books, size, MAX_SIZE);
break;
case 3:
choice3(books, size);
break;
case 4:
choice4(books, size);
break;
case 5:
choice5(books, size);
break;
case 6:
choice6(books, size);
break;
case 7:
choice7(books, size);
cout << \"Thank you.\" << endl;
break;
default:
cout << \"Invalid choice!\" << endl;
}
cout << endl;
}while(choice != 7);
return 0;
}
need comments cuase im bad at English ty
Solution
// File: yuan.h
#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
// declare book structure
struct book
{
int ISBN;
string Author;
string Title;
string publisher;
int Quantity;
double price;
};
/*function1: taking in input book structure array, size as pass by reference and the maximum size as input
return type: void
This function open the inventory file, reads the file line by line and fill the book
structure till maximum size of book structure array
*/
void choice1(book books[], int& size, int MAX_SIZE)
{
// open file
ifstream inFile;
inFile.open(\"inventory.txt\");
// check if file is opened
if (inFile.fail())
cout <<\"file could not open\"<<endl;
string str;
// read from file while maxi mum size is reached or there are no lines to read from file
while(inFile && size < MAX_SIZE)
{
// read the corresponding values of book structure
// and fill the book structure array
getline(inFile, str);
// convert string to integer using atoi and fill in the ISBN
// for corresponding array index
books[size].ISBN = atoi(str.c_str());
getline(inFile, books[size].Title);
getline(inFile, books[size].Author);
getline(inFile, books[size].publisher);
getline(inFile, str);
books[size].Quantity = atoi(str.c_str());
getline(inFile, str);
books[size].price = atoi(str.c_str());
getline(inFile, str);
// increment the size to fill the array for next index
size++;
}
cout << \"You have successfully read the file.\" << endl;
// close file
inFile.close();
}
/*function1: taking in input book structure array, size as pass by reference and the maximum size as input
return type: void
This function asks for the user input fill the book
structure till maximum size of book structure array
*/
void choice2(book books[], int& size, int MAX_SIZE)
{
if(size < MAX_SIZE)
{
string str;
// user input
cout << \"\ Enter the book ISBN: \";
// fille array
cin >> books[size].ISBN;
cout << \"Enter the author name: \";
cin >> books[size].Author;
cout << \"Enter the book tile: \";
cin >> books[size].Title;
cin.get();
cout << \"Enter the books quantity: \";
cin >> books[size].Quantity;
cout << \"Enter the book price: $\";
cin >> books[size].price;
size++;
cout << \"You have successfully inserted an entry.\" << endl;
}
}
/*function1: taking in input book structure array, size as pass by reference
return type: void
This function asks the user for ISBN number of the book, finds the book and delete the record
*/
void choice3(book books[], int& size)
{
if(size == 0)
cout << \"Array is empty. Read the data first.\" << endl;
else
{
int isbn;
// get isbn from user
cout << \"\ Enter the ISBN of the book: \";
cin >> isbn;
// search for isbn in structure array
for(int i = 0; i < size; i++)
{
// if book is found
if(books[i].ISBN == isbn)
{
int j = i;
while(j < size - 1)
{
// delete book
books[j] = books[j + 1];
j++;
}
// decrement size
size--;
break;
}
}
cout << \"You have successfully deleted an entry.\" << endl;
}
}
/*function1: taking in input book structure array, size as pass by reference
return type: void
This function allows the user to increment, decrement or add new new quantity
for a particular book by entering its ISBN
*/
void choice4(book books[], int size)
{
if(size == 0)
cout << \"Array is empty. Read the data first.\" << endl;
else
{
int isbn;
int option;
int qty;
// input isbn
cout << \"\ Enter the ISBN of the book: \";
cin >> isbn;
// ask for user choice
cout << \"1. Increment\" << endl;
cout << \"2. Decrement\" << endl;
cout << \"3. Add New\" << endl;
cout << \"Enter your option: \";
cin >> option;
// input quantity
cout << \"Enter the quantity: \";
cin >> qty;
// iterate array, find the isbn
for(int i = 0; i < size; i++)
{
if(books[i].ISBN == isbn)
{
// increment, decrement or set new quantity
if(option == 1)
books[i].Quantity += qty;
else if(option == 2)
{
books[i].Quantity -= qty;
if(books[i].Quantity)
// if quantity is less than 0, set the quantity to zero.
books[i].Quantity = 0;
}
else if(option == 3)
books[i].Quantity = qty;
break;
}
}
cout << \"You have successfully updated the array.\" << endl;
}
}
/*function1: taking in input book structure array, and size of array
return type: void
this function sorts the book array by comparing titles of books
*/
void choice5(book books[], int size)
{
// iterate the array
for(int i = 1; i < size; i++)
{
book current = books[i];
int j = i;
// compare the titles of book and sort on basis of that
while(j > 0 && (books[j - 1].Title).compare(current.Title) > 0)
{
books[j] = books[j - 1];
j--;
}
books[j] = current;
}
if(size != 0)
cout << \"You have successfully sorted the array.\" << endl;
else
cout << \"Array is empty. Read the data first.\" << endl;
}
/*function1: taking in input book structure array, and size of array
return type: void
This function prints data in array to the output console
*/
void choice6(book books[], int size)
{
// itearte the book array
for(int i = 0; i < size; i++)
{
// output the data in array
cout << endl;
cout << \"Book Number: \" << (i + 1) << endl;
cout << \"ISBN: \" << books[i].ISBN << endl;
cout << \"Author: \" << books[i].Author << endl;
cout << \"Title: \" << books[i].Title << endl;
cout << \"Quantity: \" << books[i].Quantity << endl;
cout << \"Price: $\" << books[i].price << endl;
}
if(size != 0)
cout << \"You have successfully printed the array.\" << endl;
else
cout << \"Array is empty. Read the file first.\" << endl;
}
/*function1: taking in input book structure array, and size of array
return type: void
This function open the output file, and puts the data in array to the output file
*/
void choice7(book books[], int size)
{
// open file
ofstream outFile;
outFile.open(\"finalData.dat\");
// iterate the book array and put data in file
for(int i = 0; i < size; i++)
{
outFile << \"Book Number: \" << (i + 1) << endl;
outFile << \"ISBN: \" << books[i].ISBN << endl;
outFile << \"Author: \" << books[i].Author << endl;
outFile << \"Title: \" << books[i].Title << endl;
outFile << \"Quantity: \" << books[i].Quantity << endl;
outFile << \"Price: $\" << books[i].price << endl << endl;
}
if(size != 0)
cout << \"You have successfully printed the array.\" << endl;
else
cout << \"Array is empty. Read the file first.\" << endl;
// close the file
outFile.close();
}
// File: Boookstore.cpp
#include <iostream>
#include \"yuan.h\" // include header file
using namespace std;
int main()
{
// declare cosntant variable maxsize
const int MAX_SIZE=100;
// declare and initialize variables
int size = 0;
// choice variable for user input
int choice;
// book structure array
book books[MAX_SIZE];
do
{
// display menu
cout << \"1: Read inventory forn file\" << endl;
cout << \"2: Add an entry\" << endl;
cout << \"3: Delete an entry\" << endl;
cout << \"4: Update an entry\" << endl;
cout << \"5: Sort inventory\" << endl;
cout << \"6: Display Inventory\" << endl;
cout << \"7: Write inventory to file and exit\" << endl;
cout << \"Enter your choice: \";
// user input choice
cin >> choice;
// call function of basis of choice
switch(choice)
{
case 1:
choice1(books, size, MAX_SIZE);
break;
case 2:
choice2(books, size, MAX_SIZE);
break;
case 3:
choice3(books, size);
break;
case 4:
choice4(books, size);
break;
case 5:
choice5(books, size);
break;
case 6:
choice6(books, size);
break;
case 7:
choice7(books, size);
cout << \"Thank you.\" << endl;
break;
default:
cout << \"Invalid choice!\" << endl;
}
cout << endl;
// get user choice until it wasnts to exit
}while(choice != 7);
return 0;
}
