Need feedback for my first application Cd Player.

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Game Master1330

17

Years of Service

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Joined: 19th Oct 2007

Location: (GetReaderXYZ() * 42 ) / 0

Posted: 20th Jan 2008 09:24

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Hi,
I have been running round the forums trying to work out how to program but all of a sudden last night it clicked, amazing! (Well actually i read the manual but you know...) anyway so here is my first program!

rem Cd Player
print "Press escape to exit."
print "Please insert a cd."
do
input "Please type in the track number between 1-25 that you wish to play.",tracknumber
if tracknumber=1 then load cdmusic 1,1
if tracknumber=2 then load cdmusic 2,1
if tracknumber=3 then load cdmusic 3,1
if tracknumber=4 then load cdmusic 4,1
if tracknumber=5 then load cdmusic 5,1
if tracknumber=6 then load cdmusic 6,1
if tracknumber=7 then load cdmusic 7,1
if tracknumber=8 then load cdmusic 8,1
if tracknumber=9 then load cdmusic 9,1
if tracknumber=10 then load cdmusic 10,1
if tracknumber=11 then load cdmusic 11,1
if tracknumber=12 then load cdmusic 12,1
if tracknumber=13 then load cdmusic 13,1
if tracknumber=14 then load cdmusic 14,1
if tracknumber=15 then load cdmusic 15,1
if tracknumber=16 then load cdmusic 16,1
if tracknumber=17 then load cdmusic 17,1
if tracknumber=18 then load cdmusic 18,1
if tracknumber=19 then load cdmusic 19,1
if tracknumber=20 then load cdmusic 20,1
if tracknumber=21 then load cdmusic 21,1
if tracknumber=22 then load cdmusic 22,1
if tracknumber=23 then load cdmusic 23,1
if tracknumber=24 then load cdmusic 24,1
if tracknumber=25 then load cdmusic 25,1
play music 1
delete music 1
loop
wait key

+ Code Snippet

rem Cd Player
print "Press escape to exit."
print "Please insert a cd."
do
input "Please type in the track number between 1-25 that you wish to play.",tracknumber
if tracknumber=1 then load cdmusic 1,1
if tracknumber=2 then load cdmusic 2,1
if tracknumber=3 then load cdmusic 3,1
if tracknumber=4 then load cdmusic 4,1
if tracknumber=5 then load cdmusic 5,1
if tracknumber=6 then load cdmusic 6,1
if tracknumber=7 then load cdmusic 7,1
if tracknumber=8 then load cdmusic 8,1
if tracknumber=9 then load cdmusic 9,1
if tracknumber=10 then load cdmusic 10,1
if tracknumber=11 then load cdmusic 11,1
if tracknumber=12 then load cdmusic 12,1
if tracknumber=13 then load cdmusic 13,1
if tracknumber=14 then load cdmusic 14,1
if tracknumber=15 then load cdmusic 15,1
if tracknumber=16 then load cdmusic 16,1
if tracknumber=17 then load cdmusic 17,1
if tracknumber=18 then load cdmusic 18,1
if tracknumber=19 then load cdmusic 19,1
if tracknumber=20 then load cdmusic 20,1
if tracknumber=21 then load cdmusic 21,1
if tracknumber=22 then load cdmusic 22,1
if tracknumber=23 then load cdmusic 23,1
if tracknumber=24 then load cdmusic 24,1
if tracknumber=25 then load cdmusic 25,1
play music 1
delete music 1
loop
wait key

Instructions;
1. Put a cd in.
2. type in the track number.
3. Wait until it plays.
4. To play a different track type in another track number.
5. Press escape to exit anytime you like.

HELP! IM BEEN CHASED BY 12 FIRE CHIKENS!

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SimSmall

20

Years of Service

User Offline

Joined: 7th Aug 2004

Location: United Kingdom

Posted: 21st Jan 2008 19:31 Edited at: 8th Feb 2008 10:06

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Well, it's been sort of a long time since I came anywhere near this area of the forum, so I return by offering some helpful improvements you could perhaps make:

Point 1:

Instead of:

+ Code Snippet

if tracknumber = 1 then load cdmusic 1,1
if tracknumber = 2 then load cdmusic 2,1

you could replace the whole 25 line with a single:

+ Code Snippet

load cdmusic tracknumber,1

Point 2:

Although very unlikely, a CD can have more than 25 tracks. Just before loading cdmusic, you can place an if statement to check if the track number specified was valid.

+ Code Snippet

if tracknumber < 1 or tracknumber > get number of cd tracks()
   print "track number specified does not exist" : `Change this caption to anything you feel like
else
   load cdmusic tracknumber,1
endif

Point 3:

having no CD audio cable present in my machine, I can't really check, but I suspect that the music will play for about a few milliseconds before it is deleted... You can force your program to wait while music is playing with the music playing() expression

+ Code Snippet

play music 1
repeat
   `Program is forced wait between repeat and until... until music 1 is no longer playing...
until music playing(1) = 0
delete music 1

Edit: Hopefully you spotted the error in here...
music playing(1) = 1 should indeed have been
music playing(1) = 0 like it now says

Point 4:

your wait key call is never reached, pressing escape exits the program immediately, unless you have disabled the key in advance.

All in all, it's not bad for starter code. I won't show you some of my very first creations, but here are some ways to improve...

Have fun with DBP.

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DB PROgrammer

17

Years of Service

User Offline

Joined: 9th Feb 2007

Location: Nowhere But Everywhere

Posted: 7th Feb 2008 04:19

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Well add this to the top of the program:

+ Code Snippet

Sync On         `Turns sync on
Sync Rate 60    `Sets the sync rate to 60
Sync Sleep 1    `Lets windows control how much processor to use

`You don't need this stuff I just like it
Set Display Mode 600,225,32                                      `Sets the display mode to 200x50x32
Set Window On                                                   `Makes the program in windowed mode
Set Window Size 400,150                                         `Sets the size of the window
Set Window Title "Music Player - Created By Game Master1330"    `Add name to aplication
always active on

And after a while of messing around here is what I came up with.

Sync On         `Turns sync on
Sync Rate 60    `Sets the sync rate to 60
Sync Sleep 1    `Lets windows control how much processor to use

`You don't need this stuff I just like it
Set Display Mode 600,225,32                                      `Sets the display mode to 200x50x32
Set Window On                                                   `Makes the program in windowed mode
Set Window Size 400,150                                         `Sets the size of the window
Set Window Title "Music Player - Created By Game Master1330"    `Add name to aplication
always active on

start:
cls
print "Press escape to exit."
print "Please insert a cd."
tracknumber=0
tracknumber$=""
if music exist(1)=1
delete music 1
endif

repeat
tracknumber$=newinput("Please enter a tracknumber to play-->",0,45)
tracknumber=val(tracknumber$)
if get number of cd tracks()<>0
text 0,195,"CD Inserted"
text 0,210,"There are "+str$(get number of cd tracks())+" on this CD"
else
text 0,210,"No CD Inserted"
endif
sync
until tracknumber<>0

if tracknumber < 1 or tracknumber > get number of cd tracks()
   print "track number specified does not exist" : `Change this caption to anything you feel like
   goto start
else
   load cdmusic tracknumber,1
endif
play music 1
repeat
sync
until music playing(1) = 0
goto start

function newinput(printstatement$,x,y)
blank$=""
input$=entry$(1)
text x,y,printstatement$+entry$(1)
if returnkey()=1
clear entry buffer
exitfunction input$
endif
endfunction blank$

+ Code Snippet

Sync On         `Turns sync on
Sync Rate 60    `Sets the sync rate to 60
Sync Sleep 1    `Lets windows control how much processor to use

`You don't need this stuff I just like it
Set Display Mode 600,225,32                                      `Sets the display mode to 200x50x32
Set Window On                                                   `Makes the program in windowed mode
Set Window Size 400,150                                         `Sets the size of the window
Set Window Title "Music Player - Created By Game Master1330"    `Add name to aplication
always active on

start:
cls
print "Press escape to exit."
print "Please insert a cd."
tracknumber=0
tracknumber$=""
if music exist(1)=1
delete music 1
endif

repeat
tracknumber$=newinput("Please enter a tracknumber to play-->",0,45)
tracknumber=val(tracknumber$)
if get number of cd tracks()<>0
text 0,195,"CD Inserted"
text 0,210,"There are "+str$(get number of cd tracks())+" on this CD"
else
text 0,210,"No CD Inserted"
endif
sync
until tracknumber<>0

if tracknumber < 1 or tracknumber > get number of cd tracks()
   print "track number specified does not exist" : `Change this caption to anything you feel like
   goto start
else
   load cdmusic tracknumber,1
endif
play music 1
repeat
sync
until music playing(1) = 0
goto start

function newinput(printstatement$,x,y)
blank$=""
input$=entry$(1)
text x,y,printstatement$+entry$(1)
if returnkey()=1
clear entry buffer
exitfunction input$
endif
endfunction blank$

If it was illegal to be stupid we'd run out of room.

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