User input... How to check for ENTER key

I have a section of code where the user enters input from the keyboard. I want to do something when ENTER is pressed. I am checking for '\n' but it's not working. How do you check if the user pressed the ENTER key?

if( shuffle == false ){
    int i=0;
    string line;
    while( i<20){
        cout << "Playing: ";
        songs[i]->printSong();
        cout << "Press ENTER to stop or play next song: ";
        getline(cin, line);            
        if( line.compare("\n") == 0 ){
           开发者_StackOverflow i++;
        }
    }
}

if( shuffle == false ){
    int i=0;
    string line;
    while( i<20){
        cout << "Playing: ";
        songs[i]->printSong();
        cout << "Press ENTER to stop or play next song: ";
        if( cin.get() == '\n' ) {
            i++;
        }
    }
}

getline returns only when an Enter (or Return, it can be marked either way depending on your keyboard) is hit, so there's no need to check further for that -- do you want to check something else, maybe, such as whether the user entered something else before the Enter?

getline isn't going to return until enter is pressed. If you want to check if only entered was pressed, check if the line is empty: if (line.empty())