Re: [Ql-Users] Turbo Help Please
In a message dated 24/04/2008 00:38:28 GMT Daylight Time, [EMAIL PROTECTED] writes: But if you try to compile (Turbo or Liberator) some parser error will appear... Hi Gerhard, its a codegen error : Duplicate Label Have you ever seen that error?. Its not mentionned in the manual. The lines in question compile in Qlib. Problems with IF END IF are identified with parser task. What I am wondering is if teh error message indicates a clash between, procedure names and keywords or perhaps variable definitions although nothing is obvious obviously. Here are the lines : Its part of a SELect ON value Line 9480 is the line codegen complains about. 9464=3 9466dv_POS=INT(((zone*12)/(dev_ht%-12))*(free%)):IF dv_POS1:dv_POS=1 9468IF dv_POS=dv_start 9470 scrolls=dv_start-dv_POS 9472 FOR i=1 TO scrolls 9474Dev_Scroll_down 9476IF dv_start=1 :END FOR i 9478 END FOR i 9480END IF 9482 IF dv_POS=dv_end 9484 scrolls=dv_POS-dv_end 9486 FOR i=1 TO scrolls 9488Dev_Scroll_up 9490 END FOR i 9492 IF free%-1dv_end:Dev_Scroll_up 9494END IF Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
Duncan, Try putting NEXT i in line 9476 The compiler will be seeing two ends to the FOR loop/ Derek [EMAIL PROTECTED] wrote: In a message dated 24/04/2008 00:38:28 GMT Daylight Time, [EMAIL PROTECTED] writes: But if you try to compile (Turbo or Liberator) some parser error will appear... Hi Gerhard, its a codegen error : Duplicate Label Have you ever seen that error?. Its not mentionned in the manual. The lines in question compile in Qlib. Problems with IF END IF are identified with parser task. What I am wondering is if teh error message indicates a clash between, procedure names and keywords or perhaps variable definitions although nothing is obvious obviously. Here are the lines : Its part of a SELect ON value Line 9480 is the line codegen complains about. 9464=3 9466dv_POS=INT(((zone*12)/(dev_ht%-12))*(free%)):IF dv_POS1:dv_POS=1 9468IF dv_POS=dv_start 9470 scrolls=dv_start-dv_POS 9472 FOR i=1 TO scrolls 9474Dev_Scroll_down 9476IF dv_start=1 :END FOR i 9478 END FOR i 9480END IF 9482 IF dv_POS=dv_end 9484 scrolls=dv_POS-dv_end 9486 FOR i=1 TO scrolls 9488Dev_Scroll_up 9490 END FOR i 9492 IF free%-1dv_end:Dev_Scroll_up 9494END IF Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
Morning Duncan, Hopefully I'm remembering my FOR..NEXT..END FOR syntax correctly, but the following looks remarkably suspicious : 9472 FOR i=1 TO scrolls 9474 Dev_Scroll_down 9476 IF dv_start=1 :END FOR i 9478 END FOR i I think it should be : 9472 FOR i=1 TO scrolls 9474 Dev_Scroll_down 9476 IF dv_start=1 TEHN NEXT i : END IF 9478 END FOR i I can't remember off hand if Turbo is happy with no end ifs on a single line IF, so I've always put them in myself, even in SuperBaisc interpreted programs. I also assume that if DV_STARTS is 1 or less that you want to go around the loop again and not exit from the loop itself. If you did want to bale out early, then line 9467 would change to : 9476 IF dv_start=1 THEN EXIT i : END IF Basically, and if I remember correctly, a For loop looks like this : FOR variable = start TO finish STEP step do stuff IF condition THEN EXIT variable : END IF : REM - Early exit IF other_condition THEN NEXT variable: END IF : REM - Reloop early do other stuff END FOR variable Cheers, Norman. ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
On 24 Apr 2008 at 2:57, [EMAIL PROTECTED] wrote: (...) 9476IF dv_start=1 :END FOR i This should probably be : EXIT i. Wolfgang ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
Hi Derek, Thanks that was the line. I used EXIT i as Wolfgang suggested to stop the loop. Program now compiles and now I have other bugs to fix Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
Hi Norman, Thanks that was the line. I used EXIT i as Wolfgang suggested to stop the loop. Program now compiles and now I have other bugs to fix Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
Hi Wolfgang, Thanks that was the answer. Program now compiles and now I have other bugs to fix Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
In message [EMAIL PROTECTED], [EMAIL PROTECTED] writes In a message dated 23/04/2008 19:59:57 GMT Daylight Time, [EMAIL PROTECTED] writes: Are you sure that every IF statement has an END IF ? Particularly when nested loops and conditions are coded Hi Malcolm, I am fairly sure that they do it is one of the first things I looked for. Duncan Hi Duncan, Now that I have seen the coding extract, I can see that you do have a matching IF and END IF. However, you also have a FOR loop within the IF statement as a whole, so this could be where the error is being thrown up. I do my FOR loops like this ( the long way ) FOR num%=1 TO 6 READ an_option$(num%) END FOR num% Which is what you have done too. 9472 FOR i=1 TO scrolls 9474Dev_Scroll_down 9476IF dv_start=1 :END FOR i 9478 END FOR i 9480END IF Although you may be better using the EXIT i, rather than as END FOR i I also always use integers for loops with Turbo, so i% rather than just i I use REPeat and END REPeat conditions as the main condition mode, which allows any number of IF and END IF conditions to be set up as well inside that. Always use EXIT from a REPeat. Which may achieve what you are intending to do much better, and allows for elegant looking coding. In addition I find that the SELect ON num% and END SELect again gives an elegant listing with endless options from the value of the variable. Another thing to do is to make any variables LOCal to a PROCedure, which avoids confusion when using i or i%. I hope this helps. -- Malcolm Cadman ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
Hi Duncan :) 9472 FOR i=1 TO scrolls =Beginning of the loop 9474Dev_Scroll_down 9476IF dv_start=1 :END FOR i =End of the loop 9478 END FOR i Here you have one more end of a loop (whitch never was beginning...) so parser has a big problem dupicate label !!?! 9480END IF Wolfgang and some other guys are right, in line 9476 you have to use NEXT i or EXIT i instead of END FOR i Have much fun further debuging Gerhard ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
In a message dated 24/04/2008 20:57:28 GMT Daylight Time, [EMAIL PROTECTED] writes: Wolfgang and some other guys are right, in line 9476 you have to use NEXT i or EXIT i instead of END FOR i Have much fun further debuging Thanks, I will Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
In a message dated 24/04/2008 20:33:21 GMT Daylight Time, [EMAIL PROTECTED] writes: I hope this helps. It does many thanks as I am now past the it wont compile stage to I did not think there were so many bugs to sort out stage. Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
9472 FOR i=1 TO scrolls 9474 Dev_Scroll_down 9476 IF dv_start=1 TEHN NEXT i : END IF 9478 END FOR i I can't remember off hand if Turbo is happy with no end ifs on a single line IF, so I've always put them in myself, even in SuperBaisc interpreted programs. I also assume that if DV_STARTS is 1 or less that you want to go around the loop again and not exit from the loop itself. If you did want to bale out early, then line 9467 would change to : In my programs I tend to put a catch-all in for cases like this which allows this case to go around the loop again, but also to exit the loop if exhausted: 9476 IF dv_start = 1 THEN NEXT i : EXIT i The exit gets ignored unless the loop is exhausted. Not sure if it's good programming style, but it does seem to work. -- Dilwyn Jones ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
Dilwyn Jones wrote: 9472 FOR i=1 TO scrolls 9474 Dev_Scroll_down 9476 IF dv_start=1 TEHN NEXT i : END IF 9478 END FOR i I can't remember off hand if Turbo is happy with no end ifs on a single line IF, so I've always put them in myself, even in SuperBaisc interpreted programs. I also assume that if DV_STARTS is 1 or less that you want to go around the loop again and not exit from the loop itself. If you did want to bale out early, then line 9467 would change to : In my programs I tend to put a catch-all in for cases like this which allows this case to go around the loop again, but also to exit the loop if exhausted: 9476 IF dv_start = 1 THEN NEXT i : EXIT i The exit gets ignored unless the loop is exhausted. Not sure if it's good programming style, but it does seem to work. Actually Dilwyn uses the correct style here: Try: 10 FOR i=1 TO 9 20 PRINT i; ; 30 IF i MOD 2 THEN NEXT i 40 PRINT i^2 50 END FOR i Output is: 1 2 43 4 165 6 367 8 649 81 The NEXT is ignored when i=9 It is fixed with 30 IF i MOD 2 THEN NEXT i: EXIT i -- Rich Mellor RWAP Services URL:http://www.rwapsoftware.co.uk URL:http://www.rwapservices.co.uk ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
[Ql-Users] Turbo Help Please
Am trying to compile a program with turbo 5.06. I am getting a codegen error message Duplicate Label line 9480. Line 9480 contains only END IF of a properly constructed IF END IF expression. Duplicate Label is not mentioned in the manual as a codegen error report. Can anyone clarify what the error means exactly? Thanks Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
In message [EMAIL PROTECTED], [EMAIL PROTECTED] writes Hi, Are you sure that every IF statement has an END IF ? Particularly when nested loops and conditions are coded. I know that Turbo does insist on correct syntax, without any shortcuts that the BASIC parser may sometimes accept. Which is all to the good, as it prevents an errors occurring later in the compiled code. Am trying to compile a program with turbo 5.06. I am getting a codegen error message Duplicate Label line 9480. Line 9480 contains only END IF of a properly constructed IF END IF expression. Duplicate Label is not mentioned in the manual as a codegen error report. Can anyone clarify what the error means exactly? Thanks Duncan -- Malcolm Cadman ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
In a message dated 23/04/2008 19:59:57 GMT Daylight Time, [EMAIL PROTECTED] writes: Are you sure that every IF statement has an END IF ? Particularly when nested loops and conditions are coded Hi Malcolm, I am fairly sure that they do it is one of the first things I looked for. Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
Re: [Ql-Users] Turbo Help Please
In original SuperBASIC some (dubious) programm like IF a=b then FOR i=a TO b STEP 0.1 ELSE FOR i=a TO b STEP -0.1 ENDIF ... more commands ... END FOR i may run without any problem... But if you try to compile (Turbo or Liberator) some parser error will appear... you have to write something like FOR i=a TO b STEP sign(b-a)*0.1 ... END FOR i Give more information, so perhaps someone can help... GP [EMAIL PROTECTED] wrote: In a message dated 23/04/2008 19:59:57 GMT Daylight Time, [EMAIL PROTECTED] writes: Are you sure that every IF statement has an END IF ? Particularly when nested loops and conditions are coded Hi Malcolm, I am fairly sure that they do it is one of the first things I looked for. Duncan ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm ___ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
