assembly strings - equivalent code in c++ : I've got a code in assembly:

    et:
    s db 'text'
    s_size = $ - et
      db 0Dh,0Ah,'$'

I would like to ask what does `s_size = $ - et` and `db 0Dh,0Ah,'$'`? I also wonder what would be the equivalent code of these definitions in C++? 