Convert String to Number

[1micha.elok]

Hi Marcus,

I'm making a tiny karaoke machine, but I can't find a function to convert string to number and to syncronize song and lyrics.
Could you please advise me ?

Code:

    'TOBE...synchronize lyrics and timestamps
    clearscreen()
    set caret 10,10
    for i = 1 to j-2      
       
        'time1 = left(lyrics[i],2) 'take the first two digits number of lyrics[i]
        'convert time1 from string to number
        'if 'real time' = time1 then display lyrics
                                       
        wln mid(lyrics[i],3,80)
        wait 3000 'this line should be removed if lyrics and timestamps are synchronized
    next

Herewith the full code 

Code:

'==================================================================================
'                               T.I.N.Y  K.A.R.A.O.K.E
'
' Songs :
' 1. Nathan Evans - Wellerman (Sea Shanty)
'    https://www.youtube.com/watch?v=bNQSMTNSnUw
'
' DISCLAIMER
'    It is not intended for commercial use and not for sale                      
'    No person or entity associated with this game received payment   
'    or anything of value, or entered into any agreement,             
'    in connection with any game assets used in this game.
'
'    All trademarks and game assets are the property of their respective owners. 
'    While every effort is made to acknowledge their works,
'    some of the game assets used in in this tiny game may not have
'    clear name of the artist/author/creator/developer to be referred with.
'    It may not include all relevant facts or the most up-to-date information.
'
'==================================================================================


'-----------------
' INITIALIZATION
'-----------------
set window "Karaoke",500,225,false,2

' color definition
visible black   = [0,0,0]
visible white   = [255,255,255]

' table to store lyrics line by line
lyrics = []


'-----------
' MAIN LOOP
'-----------
do
    clearscreen()

    'karaoke menu
    set caret 10,10
    wln "Karaoke"
    wln "* Choose music file (wav)"
    wln "* Choose lyric file (txt)"
    wln
    wln "Press SPACE to continue or ESC to quit"
    do
        if keydown(KEY_ESCAPE,true) then end
        wait 1
    until keydown(KEY_SPACE,true)
   
    'loop until filename is not blank
    do
        filemusic  = openfiledialog("wav")
        filelyrics = openfiledialog("txt")
    until not filemusic="" and not filelyrics=""

    'loop until ready
    loopready("Are you ready",14)

    'read lyrics from text file line by line
    f = openfile(filelyrics)
    j = 1
    do
        lyrics[j] = frln(f)
        j = j + 1
    until frln(f) = unset
    free file f

    'load and play music
    load music 1,filemusic
    play music 1

    'TOBE...synchronize lyrics and timestamps
    clearscreen()
    set caret 10,10
    for i = 1 to j-2      
       
        'time1 = left(lyrics[i],2) 'take the first two digits number of lyrics[i]
        'convert time1 from string to number
        'if 'real time' = time1 then display lyrics
                                       
        wln mid(lyrics[i],3,80)
        wait 3000 'this line should be removed if lyrics and timestamps are synchronized
    next

    'loop until ready
    loopready("Next Song ",14)
    free music 1
loop


'-----------
' FUNCTIONS
'-----------
function clearscreen()
    set color black;cls;set color white
endfunc

function loopready(message,lineNum)
    do
        'clear inside a defined rectangle
        set color black
        draw rect 10,lineNum*15,300,15,1
   
        'continue ?
        set color white
        set caret 10,lineNum*15
        write message+" (Y/N) ?"
        answer = rln()
        if upper(answer)="N" then end
    until upper(answer)="Y"
endfunc