# **C++ Project: Music Playlist Manager**
Hi everyone! Today, we’ll build a **Music Playlist Manager** in C++. This program lets users manage a playlist by adding, deleting, viewing, and searching songs, along with saving/loading playlists to/from files. Let’s dive in!
---
## **Project Overview**
### **Key Features**
1. **Add/Delete Songs**
2. **View Playlist**
3. **Search by Title/Artist**
4. **Save/Load Playlists** (using file handling)
5. **User-Friendly Menu**
### **Skills Demonstrated**
- **Vectors**: Store and manage the playlist dynamically.
- **File Handling**: Save/load playlists to/from `.txt` files.
- **String Manipulation**: Handle song titles, artists, and albums.
- **Iterators**: Efficiently search and delete songs.
---
## **Code Walkthrough**
### **1. Song Structure**
Encapsulates song details into a single unit:
```cpp
struct Song {
string title;
string artist;
string album;
int duration; // in seconds
};
```
### **2. Add a Song**
Prompts the user for song details and appends it to the playlist vector:
```cpp
void addSong(vector<Song> &playlist) {
Song newSong;
cout << "Enter song title: ";
cin.ignore();
getline(cin, newSong.title);
// Similar prompts for artist, album, duration...
playlist.push_back(newSong);
cout << "Song added successfully!\n";
}
```
### **3. View All Songs**
Displays the playlist in a formatted table. Uses `setw` for alignment:
```cpp
void viewSongs(const vector<Song> &playlist) {
if (playlist.empty()) {
cout << "Playlist is empty.\n";
return;
}
cout << "\n--- Playlist ---\n";
cout << setw(20) << "Title" << setw(20) << "Artist"
<< setw(20) << "Album" << setw(10) << "Duration\n";
for (const auto &song : playlist) {
cout << setw(20) << song.title << setw(20) << song.artist
<< setw(20) << song.album << setw(10) << song.duration << endl;
}
}
```
### **4. Search for a Song**
Searches by title or artist using a linear scan:
```cpp
void searchSong(const vector<Song> &playlist) {
string query;
cout << "Enter song title or artist: ";
cin.ignore();
getline(cin, query);
bool found = false;
for (const auto &song : playlist) {
if (song.title == query || song.artist == query) {
cout << "\nFound Song:\nTitle: " << song.title
<< "\nArtist: " << song.artist << "\nAlbum: " << song.album
<< "\nDuration: " << song.duration << " seconds\n";
found = true;
break;
}
}
if (!found) cout << "Song not found.\n";
}
```
### **5. Delete a Song**
Uses vector iterators to efficiently remove songs:
```cpp
void deleteSong(vector<Song> &playlist) {
string query;
cout << "Enter song title to delete: ";
cin.ignore();
getline(cin, query);
for (auto it = playlist.begin(); it != playlist.end(); ++it) {
if (it->title == query) {
playlist.erase(it);
cout << "Song deleted!\n";
return;
}
}
cout << "Song not found.\n";
}
```
### **6. Save/Load Playlist**
Writes songs to a text file and reloads them:
```cpp
void savePlaylist(const vector<Song> &playlist) {
ofstream file("playlist.txt");
for (const auto &song : playlist) {
file << song.title << "\n" << song.artist << "\n"
<< song.album << "\n" << song.duration << "\n";
}
file.close();
cout << "Playlist saved!\n";
}
void loadPlaylist(vector<Song> &playlist) {
ifstream file("playlist.txt");
Song song;
while (getline(file, song.title)) {
getline(file, song.artist);
getline(file, song.album);
file >> song.duration;
file.ignore();
playlist.push_back(song);
}
file.close();
cout << "Playlist loaded!\n";
}
```
### **7. Main Menu**
Drives the user interface with a loop:
```cpp
int main() {
vector<Song> playlist;
int choice;
do {
cout << "\n--- Music Playlist Manager ---\n"
<< "1. Add Song\n2. View Songs\n3. Search Song\n4. Delete Song\n"
<< "5. Save Playlist\n6. Load Playlist\n7. Exit\n"
<< "Enter choice: ";
cin >> choice;
switch (choice) {
case 1: addSong(playlist); break;
case 2: viewSongs(playlist); break;
// ... other cases ...
}
} while (choice != 7);
return 0;
}
```
---
## **Real-World Applications**
1. **Music Streaming Services**:
- Platforms like **Spotify** and **Apple Music** use similar logic to manage millions of user playlists.
2. **Local Media Players**:
- Apps like **VLC** and **Windows Media Player** allow users to create and save playlists.
3. **Event Management**:
- DJs use playlist managers to organize music for weddings, parties, and corporate events.
---
## **Case Studies & Optimization Strategies**
### **Case Study 1: Performance for Large Playlists**
**Challenge**: Linear searches in vectors become slow with 1000+ songs.
**Solution**:
- Use **`unordered_map`** for O(1) lookups by title.
- Sort the playlist and apply **binary search** for O(log n) searches.
- Store data in **binary files** (instead of text) for faster I/O.
### **Case Study 2: Preventing Data Loss**
**Challenge**: Playlist data is lost if the program crashes before saving.
**Solution**:
- Implement **auto-save** after every modification.
- Use **transactional file writes**: Save to a temporary file first, then rename it.
### **Case Study 3: Enhancing User Experience**
**Challenge**: A text-based menu feels outdated.
**Solution**:
- Build a **GUI** using frameworks like **Qt** or **wxWidgets**.
- Add features like drag-and-drop reordering, themes, and sorting options.
---
## **Sample Output**
```
--- Music Playlist Manager ---
1. Add Song
2. View Songs
3. Search Song
4. Delete Song
5. Save Playlist
6. Load Playlist
7. Exit
Enter choice: 1
Enter song title: Shape of You
Enter artist: Ed Sheeran
Enter album: Divide
Enter duration (seconds): 233
Song added successfully!
```
---
I hope this project helps you strengthen your C++ skills! Let me know if you have questions. Happy coding! 😊
---
**Changes Made**:
- Fixed syntax errors (e.g., `push_back`, semicolons, function names).
- Improved code formatting and indentation.
- Integrated real-world examples and case studies.
- Removed timestamps and chat artifacts.
- Enhanced readability with consistent headers and bullet points.
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