Hello, OnlineGDB Q&A section lets you put your programming query to fellow community users. Asking a solution for whole assignment is strictly not allowed. You may ask for help where you are stuck. Try to add as much information as possible so that fellow users can know about your problem statement easily.

Help me convert this C++ Code into C code

+3 votes
asked May 12, 2018 by annonymus
#include <iostream>

#include <string>

#include <fstream>

using namespace std;

struct book

{

string title;

string author;

string publisher;

int year;

string isbn;

book* next;

book(string, string, string, int, string, book*);

};

book::book(string tempTitle, string tempAuthor, string tempPublisher, int tempYear, string tempIsbn, book* tempNext)

:title(tempTitle), author(tempAuthor), publisher(tempPublisher), year(tempYear), isbn(tempIsbn), next(tempNext)

{}

typedef book* bookPtr;

void getline(istream &stream, string &str, char delimiter)

{ char temp[500];

stream.get(temp, 500, delimiter);

stream.ignore(500, delimiter);

str = temp;

}

void getline(istream &stream, int &num, char delimiter)

{ int temp;

stream >> temp;

stream.ignore(500, delimiter);

num= temp;

}

void readFile(bookPtr &root);

void insert (bookPtr &root);

void delTitle(bookPtr &root);

bookPtr locateNode(bookPtr temp, string tit);

void delIsbn(bookPtr &root);

bookPtr locateNodeIsbn(bookPtr temp, string isb);

void searchIsbn(bookPtr temp);

void printList(bookPtr temp);

void printAuthor(bookPtr temp);

void saveFile(bookPtr temp);

int countNodes(bookPtr temp);

int main()

{

int choice;

bookPtr root = NULL;

readFile(root);

do

{

cout << "Menu: Select your option\n\n";

cout << "(1) Add a book to the list\n";

cout << "(2) Delete a book based on Title\n";

cout << "(3) Delete a book based on ISBN\n";

cout << "(4) Search for a book by ISBN.\n";

cout << "(5) List all books.\n";

cout << "(6) List all books by an author.\n";

cout << "(7) Quit.\n\n";

cout << "Enter your choice ---> ";

cin >> choice;

if (1 <= choice && choice <= 6)

{

switch (choice)

{

case 1:

insert(root);

break;

case 2:

delTitle(root);

break;

case 3:

delIsbn(root);

break;

case 4:

searchIsbn(root);

break;

case 5:

printList(root);

break;

case 6:

printAuthor(root);

break;

default:

cout << "Invalid choice.  Enter again.\n\n";

break;

}

}

}

while (choice != 7);

saveFile(root);

return 0;

}

void readFile(bookPtr &root)

{

int numBooks, yea;

string tit, aut, pub, isb;

ifstream infile ("books.txt", ios::in);

infile >> numBooks;

infile.ignore(500,'\n');

for (int count = 0; count < numBooks; count++)

{

getline(infile, tit, '\n');

getline(infile, aut, '\n');

getline(infile,pub, '\n');

getline(infile,yea, '\n');

getline(infile, isb, '\n');

root = new book (tit, aut, pub, yea, isb, root);

}

}

void insert (bookPtr &root)

{

string tit, aut, pub, isb;

int yea;

cout << "Title:\t\t\t";

cin.ignore(500,'\n');

getline(cin, tit, '\n');

cout << "Author:\t\t\t";

getline(cin, aut, '\n');

cout << "Publisher:\t\t";

getline(cin,pub, '\n');

cout << "Year:\t\t\t";

getline(cin,yea, '\n');

cout << "ISBN:\t\t\t";

getline(cin, isb, '\n');

root = new book (tit, aut, pub, yea, isb, root);

}

void delTitle(bookPtr &root)

{

string tit;

cout << "Book Title:\t\t\t";

cin.ignore(500,'\n');

getline(cin, tit, '\n');

bookPtr p = locateNode(root, tit);

if (p == NULL)

cout << "\nDeletion cannot be done.\n\n";

else if (root == p)

root = p->next;

else

{

bookPtr q = root;

while (q->next != p)

q = q->next;

q->next = p->next;

}

delete p;

}

bookPtr locateNode(bookPtr temp, string tit)

{

while (temp != NULL)

{

if (temp->title == tit)

{

return temp;

}

temp = temp->next;

}

return NULL;

}

void delIsbn(bookPtr &root)

{

string isb;

cout << "Book ISBN:\t\t\t";

cin.ignore(500,'\n');

getline(cin, isb, '\n');

bookPtr p = locateNodeIsbn(root, isb);

if (p == NULL)

cout << "\nDeletion cannot be done.\n\n";

else if (root == p)

root = p->next;

else

{

bookPtr q = root;

while (q->next != p)

q = q->next;

q->next = p->next;

}

delete p;

}

bookPtr locateNodeIsbn(bookPtr temp, string isb)

{

while (temp != NULL)

{

if (temp->isbn == isb)

{

return temp;

}

temp = temp->next;

}

return NULL;

}

void searchIsbn(bookPtr temp)

{

string isb;

cout << "Book ISBN:\t\t\t";

cin.ignore(500,'\n');

getline(cin, isb, '\n');

while (temp != NULL)

{

if (isb == temp->isbn)

{

cout << temp->title << "\n";

cout << temp->author << "\n";

cout << temp->publisher << "\n";

cout << temp->year << "\n";

cout << temp->isbn << "\n\n";

}

temp = temp->next;

}

cout << "\n";

}

void printList(bookPtr temp)

{

while (temp != NULL)

{

cout << temp->title << "\n";

cout << temp->author << "\n";

cout << temp->publisher << "\n";

cout << temp->year << "\n";

cout << temp->isbn << "\n\n";

temp = temp->next;

}

cout << "\n";

}

void printAuthor(bookPtr temp)

{

string aut;

cout << "Author name:\t\t\t";

cin.ignore(500,'\n');

getline(cin, aut, '\n');

while (temp != NULL)

{

if (temp->author == aut)

{

cout << temp->title << "\n";

cout << temp->author << "\n";

cout << temp->publisher << "\n";

cout << temp->year << "\n";

cout << temp->isbn << "\n\n";

}

temp = temp->next;

}

cout << "\n";

}

void saveFile(bookPtr temp)

{

int count = countNodes(temp);

ofstream outFile("saved.txt",ios::out);

outFile << count << "\n";

while (temp != NULL)

{

outFile << temp->title << "\n";

outFile << temp->author << "\n";

outFile << temp->publisher << "\n";

outFile << temp->year << "\n";

outFile << temp->isbn << "\n";

temp = temp->next;

}

cout << "\n";

}

int countNodes(bookPtr temp)

{

int countB = 0;

while (temp != NULL)

{

countB++;

temp = temp->next;

}

return countB;

}

2 Answers

0 votes
answered Oct 11, 2018 by Lukas (540 points)
thats way too long :D
commented Oct 11, 2018 by Shane Such (860 points)
I agree with that. to the dude who wrote this do it line by line.
0 votes
answered Feb 20, 2019 by anonymous
May I know the root stands for what?
Welcome to OnlineGDB Q&A, where you can ask questions related to programming and OnlineGDB IDE and and receive answers from other members of the community.
...