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create sized dynamic array of class private members

theleonicking (18)
For my project I'm working on, I have to create a dynamic character array to model my categories like name and title that are private in their class. The arrays also have to be the exact length of the strings plus 1 for the null character. I'm not exactly sure how to implement this though. I would appreciate any help/pointers if you have them.

///myUtil.cpp///////////////////


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#include "myUtil.h"

int getInt()
{
        int     temp;

        cin >> temp;
        while(!cin)
        {
                cin.clear();
                cin.ignore(MAX_CHAR, '\n');

                cout << "You entered an illegal integer. Please try again: ";
                cin >> temp;
        }
        cin.ignore(MAX_CHAR, '\n');
        return temp;
}

float getFloat()
{
        float   temp;

        cin >> temp;
        while(!cin)
        {
                cin.clear();
                cin.ignore(MAX_CHAR, '\n');

                cout << "You entered an illegal floating point value. Please try again: ";
                cin >> temp;
        }
        cin.ignore(MAX_CHAR, '\n');
        return temp;
}

char getChar()
{
        char    temp;

        cin >> temp;
        while(!cin)
        {
                cin.clear();
                cin.ignore(MAX_CHAR, '\n');

                cout << "You need to enter a character. Please try again: ";
                cin >> temp;
        }
        cin.ignore(MAX_CHAR, '\n');
        return temp;
}

void getString(char str[], int maxChar)
{
        cin.get(str, maxChar, '\n');
        while(!cin)
        {
                cin.clear();
                cin.ignore(maxChar, '\n');

                cout << "You did not enter anything. Please try again: ";
                cin.get(str, maxChar, '\n');
        }
        cin.ignore(MAX_CHAR, '\n');
}




//myUtil.h/////////////////////////////


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#ifndef MYUTIL_H
#define MYUTIL_H

#include <iostream>
using namespace std;
#include <cstring>

const int MAX_CHAR = 101;

int getInt();
float getFloat();
char getChar();
void getString(char str[], int maxChar);

#endif




Last edited on
theleonicking (18)
////songlist.cpp////////////////////////////////////////////////////


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#include "songlist.h"
#include<cstring>
#include <fstream>

SongList::SongList()
{
        //Song* list;
        //list=new Song[CAP];
        size = 0;
}

SongList::~SongList()
{
        //delete[] list;
}

void SongList::addSong(const Song& aSong)
{
        list[size] = aSong;
        size++;
}

void SongList::listAll() const
{
        for(int i=0; i<size; i++)
        {
                list[i].print();
        }
}

void SongList::loadSongs(const char fileName[])
{
        ifstream        in;
        char            title[MAX_CHAR];
        char            album[MAX_CHAR];
        char            artist[MAX_CHAR];
        char            buffer[MAX_CHAR];
        char            *pch;
        float           min;
        float           sec;

        Song currSong;
        in.open(fileName);
        if(!in)
        {
                cerr << "Failed to open " << fileName << " for reading!" << endl;
                exit(1);
        }

          while( in.getline(buffer, MAX_CHAR) )
        {

                char temp[5][MAX_CHAR];
                int counter;

                counter=0;
                pch=strtok (buffer,";");

                while(pch!=nullptr)
                {
                        strcpy(temp[counter], pch);
                        pch = strtok (nullptr, ";");
            counter++;
                }

                //cout<<"string length is: "<<strlen(temp[0])<<endl;
                strcpy(title, temp[0]);
                strcpy(artist, temp[1]);
                strcpy(album, temp[2]);
                min=atoi(temp[3]);
                sec=atoi(temp[4]);
                cout<<"Title: "<<title<<endl;
                cout<<"Artist: "<<artist<<endl;
                cout<<"Album: "<<album<<endl;
                cout<<"Min: "<<min<<endl;
                cout<<"Sec: "<<sec<<endl<<endl;


                currSong.setTitle(title);
                currSong.setArtist(artist);
                currSong.setAlbum(album);
                currSong.setMin(min);
                currSong.setSec(sec);
                addSong(currSong);
        }
        in.close();
}

void SongList::removeIndex()
{
        char    title[MAX_CHAR];
        char    artist[MAX_CHAR];
        char    album[MAX_CHAR];
        float   min;
        float   sec;
        int     i;
        int     index;
        int     a;

        cout<<"Please enter the index number of the song you wish to remove: ";
        cin>>index;
        while(!cin)
        {
                cin.clear();
                cin.ignore(MAX_CHAR, '\n');
                cout << "You entered an illegal integer. Please try again: ";
                cin >> index;
        }
        for(i=index;i<size;i++)
        {
                a=i+1;
                list[a].getTitle(title);
                list[a].getArtist(artist);
                list[a].getAlbum(album);
                min=list[a].getMin();
                sec=list[a].getSec();

                list[i].setTitle(title);
                list[i].setArtist(artist);
                list[i].setAlbum(album);
                list[i].setMin(min);
                list[i].setSec(sec);
        }
        size--;
}

int SongList::searchArtist() const
{
        char    title[MAX_CHAR];
        char    artist[MAX_CHAR];
        char    Artist[MAX_CHAR];
        char    album[MAX_CHAR];
        float   min;
        float   sec;
        int     i;

        i=0;
        cout<<"Please enter the name of the song's artist: ";
        cin.get(Artist, MAX_CHAR, '\n');
        cin.ignore(MAX_CHAR, '\n');
        char *b1=Artist;
        strcpy(b1, Artist);
        int Compare;
        char *b2=artist;
        cout<<"Searching..."<<endl<<endl;
        do
        {
                do
                {
                        list[i].getArtist(artist);
                        Compare=strcmp(b1,b2);
                        b2=artist;
                        i++;
                        if(i>size)
                        {
                                cout<<"End of library reached."<<endl;
                                return 1;
                        }
                 }while(Compare!=0);

                i=i-1;
                list[i].getTitle(title);
                list[i].getArtist(artist);
                list[i].getAlbum(album);
                min=list[i].getMin();
                sec=list[i].getSec();
                cout<<"Title: "<<title<<endl;
                cout<<"Artist: "<<artist<<endl;
                cout<<"Album: "<<album<<endl;
                cout<<"Duration: "<<min<<"."<<sec<<endl<<endl;
                i++;
        }while(i<size);
        return 0;
}


int SongList::searchAlbum() const
{
        char    title[MAX_CHAR];
        char    artist[MAX_CHAR];
       char    album[MAX_CHAR];
        char    Album[MAX_CHAR];
        float   min;
        float   sec;
        int     i;

        i=0;
        cout<<"Please enter the name of the song's album: "<<endl;
        cin.get(Album, MAX_CHAR, '\n');
        cin.ignore(MAX_CHAR, '\n');
        char *b1=Album;
        strcpy(b1, Album);
        int Compare;
        char *b2=album;
        cout<<"Searching..."<<endl<<endl;
        do
        {
                do
                {
                        list[i].getAlbum(album);
                        Compare=strcmp(b1,b2);
                        b2=album;
                        i++;
                        if(i>size)
                        {
                                cout<<"End of library reached."<<endl;
                                return 1;
                        }
                 }while(Compare!=0);

                i=i-1;
                list[i].getTitle(title);
                list[i].getArtist(artist);
                list[i].getAlbum(album);
                min=list[i].getMin();
                sec=list[i].getSec();
                cout<<"Title: "<<title<<endl;
                cout<<"Artist: "<<artist<<endl;
                cout<<"Album: "<<album<<endl;
                cout<<"Duration: "<<min<<"."<<sec<<endl<<endl;
                i++;
        }while(i<size);
        return 0;
}
void SongList::saveSongs(const char fileName[]) const
{
        char            title[MAX_CHAR];
        char            artist[MAX_CHAR];
        char            album[MAX_CHAR];
        float           min;
        float           sec;
        ofstream        out;

        out.open(fileName);
        if(!out)
        {
                cerr << "Failed to open " << fileName << " for writing!" << endl;
                exit(1);
        }

        for(int i=0; i<size; i++)
        {
  list[i].getTitle(title);
                list[i].getArtist(artist);
                list[i].getAlbum(album);
                min = list[i].getMin();
                sec = list[i].getSec();
                out << title << ';' <<artist<<";"<<album<<";"<< min << ";"<<sec<<endl;
        }
        out.close();
}


/////songlist.h///////////////////////////////////////////////////

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#include "song.h"

class SongList
{
public:
        SongList();
        ~SongList();


        void addSong(const Song& aSong);
        void removeIndex();
        void listAll() const;
        void loadSongs(const char fileName[]);
        void saveSongs(const char fileName[]) const;
        int  searchAlbum() const;
        int  searchArtist() const;
private:
        const static int CAP = 10;
        Song    list[CAP];
        int     size;
};


Last edited on
theleonicking (18)
//////song.cpp/////////////////////////////////////////////////////////


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#include "song.h"

Song::Song()
{
        init("no title","No artist","No Album", 0, 0);
}

Song::Song(const char name[])
{
        init(title,"No artist","No album", 0, 0);
}

Song::Song(const char title[], float min)
{
        init(title,"No artist", "No album", min, 0);
}

void Song::init(const char title[],const char artist[], const char album[], float min, float sec)
{
        strcpy(this->title, title);
        strcpy(this->artist, artist);
        strcpy(this->album, album);
        this->min = min;
        this->sec=sec;
}

Song::~Song(){}

void Song::getTitle(char title[]) const
{
        strcpy(title, this->title);
}

void Song::setTitle(const char title[])
{
        strcpy(this->title, title);
}
void Song::getArtist(char artist[]) const
{
        strcpy(artist, this->artist);
}

void Song::setArtist(const char artist[])
{
        strcpy(this->artist, artist);
}

void Song::getAlbum(char album[]) const
{
        strcpy(album, this->album);
}

void Song::setAlbum(const char album[])
{
        strcpy(this->album, album);
}

void Song::setMin(float min)
{
        this->min = min;
}
void Song::setSec(float sec)
{
        this->sec=sec;
}

float Song::getSec() const
{
        return sec;
}

void Song::readIn()
{
        cout << "Please enter the song's Title: ";
        getString(title, MAX_CHAR);
        cout<< "Please enter the song's artist: ";
        getString(artist, MAX_CHAR);
        cout<<"Please enter the song's album: ";
        getString(album, MAX_CHAR);
        cout << "Please enter how many minutes are in the song: ";
        min = getFloat();
        cout<<"Please enter how many seconds remain in the song after the minutes you entered above are up: ";
        sec=getFloat();
}

void Song::print() const
{
        cout << title << ": " << artist<<":"<<album<< ":"<<min << ":"<<sec<<endl;
}


//////////song.h/////////////////////////////////////////////////////////////////////////////////


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#ifndef SONG_H
#define SONG_H

#include "myUtil.h"

class Song
{
public:
        Song();
        Song(const char title[]);
        Song(const char title[], float min);
        ~Song();

        void getTitle(char title[]) const;
        void setTitle(const char title[]);
        void getArtist(char artist[]) const;
        void setArtist(const char artist[]);
        void getAlbum(char album[]) const;
        void setAlbum(const char album[]);
        float getMin() const;
        void setMin(float min);
        float getSec() const;
        void setSec(float sec);
        void print() const;
        void readIn();
private:
        char    title[MAX_CHAR];
        char    artist[MAX_CHAR];
        char    album[MAX_CHAR];
        float   min;
        float   sec;
        void init(const char title[],const char artist[], const char album[], float min, float sec);
};

#endif



////////ui.cpp///////////////////////////////////////////////////////////////////////////////


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#include "ui.h"
#include "myUtil.h"

void displayMenu(int &cmd);

void start()
{
        char            command;
        SongList        roster;
        char    fileName[] = "music.txt";


        roster.loadSongs(fileName);
        displayMenu();
        command=readInCommand();
        while(command!= 'q')
        {
                executeCommand(command, roster);
                displayMenu();
                command=readInCommand();
        }
        roster.saveSongs(fileName);
}

void displayMenu()
{
        cout << endl << "Welcome to your music library. Please enter one of the following options." << endl
                << "     a. Add new song " << endl
                << "     l. Display library " << endl
                << "     i. Remove song by index number " << endl
                << "     d. Search for a song by album " << endl
                << "     t. Search for a song by artist "<<endl
                << "     q. Quit " << endl << endl;
}

char readInCommand()
{
        char cmd=getChar();
        return tolower(cmd);
}

void executeCommand(char cmd, SongList& list)
{
        Song    aSong;

        switch(cmd)
        {
                case 'a':
                        aSong.readIn();
                        list.addSong(aSong);
                        break;
                case 'l':
                        list.listAll();
                        break;
                case 'i':
                        list.removeIndex();
                        break;
                case 'd':
                        list.searchAlbum();
                        break;
                case 't':
                        list.searchArtist();
                        break;
                case 'q':
                        cout<<"Goodbye"<<endl;
                        break;
                default:
                        cout << "You have enterd an invalid option, please try again." << endl;
                        break;
        }
}



////////ui.h/////////////////////////////////////////////////////////

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#ifndef UI_H
#define UI_H

#include "songlist.h"

void start();
void displayMenu();
char readInCommand();
void executeCommand(char command, SongList& list);

#endif



//////app.cpp/////////////////////////////////////////////////////////


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#include "ui.h"

int main()
{
        start();
        return 0;
}



////music.txt///////////////

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Break;Three Days Grace;Life Starts Now;3;13
Joker And The Thief;Wolfmother;Wolfmother;4;40
Come with Me Now;Kongos;Lunatic;3;31
I Am Machine;Three Days Grace;Human;3;20
Help Is on the Way;Rise Against;Endgame;3;57
Black Hole Sun;Soundgarden;Superunknown:5:18;3;57
Immigrant Song;Led Zeppelin;Led Zeppelin 3;2;26

Last edited on
salem c (3686)
C'mon dude, you must have seen nicer formatting on this forum by now and wondered how.
http://www.cplusplus.com/articles/jEywvCM9/
theleonicking (18)
I have and my code didn't look like this in the submission section. All the tabbing disappeared when I submitted it. Not sure why the code block didn't work though.

Edit: I see from the link I can highlight and click source code so I'll try that instead
Last edited on
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