Midi Note Array in c++

makeArray.cpp

    //Create midi note array...
    void makeArray{
        vector<bool> notes
        int octave;//octave is 0 - 8;
        
        const string note_substring[12] = 
        {
        "C","C#","D","D#",
        "E","F","F#","G",
        "G#","A","A#","B"
        };
        
            for(int noteNum=0; noteNum<=108;noteNum++){
                octave = noteNum /12;
                notes.push_back(note_substring[noteNum%12]+to_string(octave));
            }
        
    }