Tukukkk

So i set my array value as 100 and when i want to display my array,the others array with no value will also display. Any ways to remove it ? Thanks!

#include<iostream>

#include<iomanip>

#include<cstring>

#include<string>

#include<fstream>  

#include<limits>

#include<sstream>

using namespace std;



char add();

char list();





struct Book //structure for the book

{

char title[50];

char author[50];

int price;

void display() {

    cout << "Name:" << title << endl

        << "Author:" << author<< endl

        << "Price:" << price << endl << endl;

}



};

Book book[100];



void main()

{



int selection;





do {

cout << "Activity Selection: " << endl;

cout << "1.  Add book" << endl;

cout << "2.  List all books" << endl;

cout << "3.  Search book" << endl;

cout << "4.  Check total book purchased and total spent" << endl;

cout << "5.  Quit" << endl;

cout << "Please enter your selection(1/2/3/4/5): ";

cin >> selection;

cin.ignore();





    switch (selection)

    {



    case 1:

        add();

        break;

    case 2:

        list();

        break;

    case 3:

        cout << "number 3" << endl;

        break;

    case 4:

        cout << "number 4" << endl;

        break;

    default:

        exit(1);

        break;

    }

    } while (selection <= 4);







system("pause");

}



char add()

{

int i;





ofstream outFile;

outFile.open("Records.dat", ios::app);

if (!outFile.is_open())

{

    cout << "Can’t open file.";

    system("pause");

    exit(1);

}





cout << "Please enter the book title:";

cin.getline(book[i].title, 51);

cout << "Please enter the author name of the book:";

cin.getline(book[i].author, 51);

cout << "Please enter the price of the book RM: ";

cin >> book[i].price;

cout << "nThe book""<< book[i].title <<""has been added to the system.n" << 

endl;

outFile << book[i].title << "," << book[i].author << "," << book[i].price << 

endl;

outFile.close();







}



char list() //second solution but still doesnt work need some fixing here i think

{

int i;

string line, token;

ifstream inFile;

inFile.open("Records.dat", ios::in);

if (!inFile.is_open())

{

    cout << "File could not open" << endl;

    system("pause");

    exit(1);

}

char data;

while (getline(inFile,line))

{



    inFile.get(data);

    if (!(data == 0));

    cout << data;

}

cout << endl;

inFile.close();

}

when i debug something like this come out :
ss

this is the second solution i come out with but still does not work

 char list()

{

int i , count = 0;

string line, token;

ifstream inFile;

inFile.open("Records.dat", ios::in);

if (!inFile.is_open())

{

    cout << "File could not open" << endl;

    system("pause");

    exit(1);

}

char data;

while (getline(inFile, line))

{



    stringstream ss(line);

    getline(ss, token, ',');

    stringstream(token) >> book[i].title;

    getline(ss, token, ',');

    stringstream(token) >> book[i].author;

    getline(ss, token, ',');

    stringstream(token) >> book[i].price;

    i++;



}

cout << endl;

inFile.close();

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

    book[i].display();





}

The problem is i dont really know how to display the array using the dat file and i successfully display it but theres error

You are reading the CSV as a text file and just printing it.
So, the solution is to make a record class, read it from stream, then check it whether it is empty or no.

#include <iostream>

#include <sstream>

using namespace std;



class Record {

private:

    std::string title;

    std::string shortTitle;

    int number;

public:

    Record(std::string title, std::string shortTitle, int number): title(title),

                                                         shortTitle(shortTitle),

                                                                 number(number){



    }

    inline std::string getTitle() const { return title; }

    inline std::string getShortTitle() const { return shortTitle; }

    inline int getNumber() const { return number; }

};



// Make this function capable of handling any stream by making it template

// (anything that could be passed to a `getline` as a first parameter and have

//  an operator >> overloaded that accepts an integer)

template<typename Stream>

Record readFromStream(Stream &str) {

    std::string title;

    std::string shortTitle;

    int number;

    std::string line;

    // Read a line from the stream

    getline(str, line);

    // Make a new stream from that line

    std::stringstream lineStream(line);

    // Read until the comma

    getline(lineStream, title, ',');

    getline(lineStream, shortTitle, ',');

    // The last one is an integer, simply read it

    lineStream >> number;

    return Record(title, shortTitle, number);

}



int main() {

    Record rec = readFromStream(cin);

    // Check for emptiness, if is NOT empty write it

    if (rec.getTitle().size() && rec.getShortTitle().size()) {

        cout << rec.getTitle() << "n";

        cout << rec.getShortTitle() << "n";

        cout << rec.getNumber() << "n";

    }

    return 0;

}