I have written some code in order satisfy my c++ homework. The question reads as follows:
You are asked to write an app to keep track of a relatively small music library. The app should load song information from a data file once the app is started. It should allow user to view, add, remove, and search for songs. The app should save the data back to the same data file when the program exits. What Your Program Should Do: Write an interactive text based menu interface (using a loop) that will allow the user to Enter information for a new song Display information for all the songs in the database with index for each song Remove a song by index Search for songs by a certain artist Search for songs by a certain album Quit For each song, you need to keep track of: title artist duration album Allow the program to keep looping until user wants to quit. When the program starts, it should load the tasks from external file ("songs.txt") into memory. When user enters information about the new song, the program needs to read them in, save them in memory and eventually write them to the external data file ("songs.txt").
Unfortunately, though the code compiles, when I try to use the commands inside, I keep getting a Segmentation error. Any ideas? Here is my code right now: /**/
include <iostream>
include <cstring>
include <iomanip>
include <fstream>
using namespace std;
int NO_OF_SONGS;
struct songInfo { char title[30]; char artist[30]; int durationMin; int durationSec; char album[30]; };
void addSong (songInfo list[], int& listSize); void removeSong (songInfo list[], int& listSize); void displayList (songInfo list[], int listSize); void searchList (songInfo list[], int listSize); void readList (ifstream& infile, songInfo list[], int& listSize); void printList (ofstream& outfile, songInfo list[], int listSize);
int main() { songInfo trackListing[NO_OF_SONGS];
char selection;
cout << "*Music Track Database*" << endl;
do
{
ifstream infile ("songs.txt");
ofstream outfile;
if (!infile)
{
cout << "Cannot open file: songs.txt";
}
cout << "Main Menu:" << endl;
cout << endl;
cout << "(a)dd a song" << endl;
cout << "(r)emove a song" << endl;
cout << "(d)isplay track listings" << endl;
cout << "(s)earch for a track" << endl;
cout << "(q)uit" << endl;
cout << endl;
cout << "Select (a, r, d, s, q): ";
cin >> selection;
cout << endl;
if (selection != 'a' && selection != 'r' && selection != 'd' && selection != 's' && selection != 'q')
{
cout << "Select (a, r, d, s, q): ";
cin >> selection;
cout << endl;
}
switch (selection)
{
case 'a':
readList(infile, trackListing, NO_OF_SONGS);
addSong(trackListing, NO_OF_SONGS);
printList(outfile, trackListing, NO_OF_SONGS);
break;
case 'd':
readList(infile, trackListing, NO_OF_SONGS);
displayList(trackListing, NO_OF_SONGS);
break;
case 'r':
cout << "Remove a Song" << endl;
case 's':
do
{
readList(infile, trackListing, NO_OF_SONGS);
searchList(trackListing, NO_OF_SONGS);
cout << "(r)emove song" << endl;
cout << "(s)earch again" << endl;
cout << "(m)ain menu" << endl;
cout << "(r, s, m): ";
cin >> selection;
cout << endl;
cout << endl;
if (selection != 'r' && selection != 's' && selection != 'm')
{
cout << "(r, s, m): ";
cin >> selection;
}
if (selection == 'r')
{
removeSong(trackListing, NO_OF_SONGS);
printList(outfile, trackListing, NO_OF_SONGS);
}
}while(selection != 'm');
break;
}
}while (selection != 'q');
cout << "Happy Trails To You; Until We Meet Again!" << endl;
return 0;
}
void addSong (songInfo list[], int& listSize) { int i = ++listSize; cout << "Add a Song" << endl; cout << endl; cout << "Enter Song Title: "; cin.ignore(); cin.get(list[i].title, 30); cout << endl;
cout << "Enter Artist Name: ";
cin.ignore();
cin.get(list[i].artist, 30);
cout << endl;
cout << "Enter Track Duration: ";
cout << endl;
cout << "(Seperate mins & secs with a space.";
cout << endl;
cout << "ex: if 3:40, enter 3 40): ";
cin >> list[i].durationMin >> list[i].durationSec;
cout << endl;
cout << "Enter Album Title: ";
cin.ignore();
cin.get(list[i].album, 30);
cout << endl;
cout << endl;
cout << "Song Added to Database!";
cout << endl;
}
void readList (ifstream& infile, songInfo list[], int& listSize) { int i = 1; while (!infile.eof()) { infile.ignore(); infile.ignore(); infile.get(list[i].title, 30); infile.ignore(); infile.ignore(); infile.get(list[i].artist, 30); infile.ignore(); infile >> list[i].durationMin >> list[i].durationSec; infile.ignore(); infile.ignore(); infile.ignore(); infile.get(list[i].album, 30); i++; } listSize = i; } void printList (ofstream& outfile, songInfo list[], int listSize) { outfile.open ("songs.txt"); int i; outfile << left << setw(14) << '#' << left << setw(21) << "Song Name" << left << setw(21) << "Artist Name" << left << setw(20) << "Duration" << left << setw(22) << "Album Title" << endl; outfile << left << setw(76) << setfill ('-') << '-' << endl; outfile << setfill (' '); for (i=1; i<listSize; i++) { outfile << left << setw(2) << i << left << setw(32) << list[i].title << left << setw(32) << list[i].artist << right << setw(4) << list[i].durationMin << ':' << left << setw(5) << list[i].durationSec << left << setw(32) << list[i].album << endl; } outfile << left << setw(78) << setfill ('-') << '-' << endl; } void removeSong (songInfo list[], int& listSize) { int i; int e; cout << "Enter Track Number to Confirm Deletion: "; cin >> e; cout << endl;
for (i=0; i<listSize; i++)
{
if (e==i)
{
for(i=e; i<listSize; i++)
{
list[i] = list[i+1];
}
listSize--;
}
}
}
void displayList (songInfo list[], int listSize) { int i; cout << left << setw(14) << '#' << left << setw(21) << "Song Name" << left << setw(21) << "Artist Name" << left << setw(20) << "Duration" << left << setw(22) << "Album Title" << endl; cout << left << setw(110) << setfill ('-') << '-' << endl; cout << setfill (' '); for (i=1; i<listSize; i++) { cout << left << setw(2) << i << left << setw(32) << list[i].title << left << setw(32) << list[i].artist << right << setw(4) << list[i].durationMin << ':' << left << setw(5) << list[i].durationSec << left << setw(32) << list[i].album << endl; } cout << left << setw(110) << setfill ('-') << '-' << endl; } void searchList (songInfo list[], int listSize) { char aOrB; int i; char artist[30]; char album[30];
cout << "Search by (a)rtist or al(b)um? (a or b): ";
cin >> aOrB;
cout << endl;
if (aOrB != 'a' && aOrB != 'b')
{
cout << "(a or b): ";
cin >> aOrB;
cout << endl;
}
if (aOrB == 'a')
{
cout << "Artist Name: ";
cin.ignore();
cin.get(artist, 30);
for(i=0; i<listSize; i++)
{
if (artist == list[i].artist)
{
cout << left << setw(2) << i << left << setw(32) << list[i].title << left << setw(32) << list[i].artist << right << setw(4) << list[i].durationMin << ':' << left << setw(5) << list[i].durationSec << left << setw(32) << list[i].album << endl;
}
else
cout << "Artist not found" << endl;
}
}
else
{
cout << "Album Name: ";
cin.ignore();
cin.get(album, 30);
for(i=0; i<listSize; i++)
{
if (album == list[i].album)
{
cout << left << setw(2) << i << left << setw(32) << list[i].title << left << setw(32) << list[i].artist << right << setw(4) << list[i].durationMin << ':' << left << setw(5) << list[i].durationSec << left << setw(32) << list[i].album << endl;
}
else
cout << "Album not found" << endl;
}
}
}