I Need Help (Probably with write to or open file)

[Hive]

I don't why it's doing this & it's racking my brain figuring it out but here is the cod I wrote.

I want it so that when the letters AAAA count up to ZZZZ it will write into a text file & new text file every 500kb. I figure swallow my pride & ask you people.

Here is the code.

Code: Select all

Declare Function Increase$ (Lett As String) 

' You start off with AAAA 
Dim Letters As String 
Letters = "AAAA" 

Open "C:\My Documents\letters.txt" For Output As #1 

Do 
   Print #1, Letters 
   Letters = Increase$(Letters) 
Loop Until Letters = "AAAA"  'it gets AAAA again after ZZZZ (but isn't printed) 
Close 
End 


Function Increase$ (Lett As String) 
   Dim RetStr As String 
   Dim position As Integer, flipped As Integer 

   RetStr = Lett 
   flipped = 0 
   position = 1 
   Do 
      ' reset flag 
      flipped = 0 

      ' increase the letter at specified position 
      If Mid$(RetStr, position, 1) = "Z" Then 
         Mid$(RetStr, position, 1) = "A" 
         flipped = -1 
         position = position + 1 
      Else 
         Mid$(RetStr, position, 1) = Chr$(Asc(Mid$(RetStr, position, 1)) + 1) 
      End If 
   Loop Until Not(flipped) Or position = Len(RetStr) + 1 

   Increase$ = RetStr 
End Function

in the Open "C:\My Documents\letters.txt" For Output As #1 column when it keeps telling me there is a path error but I'm pretty sure that's the right path. If I just put the "letters.txt" & hit run a black screen comes up for an about 10 seconds then it tells me to hit continue which when I check the file it supposed to write to after, nothing in it.

I hope this wasn't to long for you people, thank you[/code]

[Mac]

QBasic can only write to files with 8-character or less names

c:\abc\defghijk\m\happy.txt is a legal name

c:\My Documents\happy.txt is not

Mac
The QBasic Forum
http://www.network54.com/Forum/13959

[Buff1]

DECLARE FUNCTION Increase$ (Lett AS STRING)

' You start off with AAAA
DIM Letters AS STRING
Letters = "AAAA"

OPEN "C:\letters.txt" FOR OUTPUT AS #1

DO
PRINT #1, Letters
Letters = Increase$(Letters)
LOOP UNTIL Letters = "AAAA" 'it gets AAAA again after ZZZZ (but isn't printed)
CLOSE
END


FUNCTION Increase$ (Lett AS STRING)
test$ = MID$(Lett, 1, 1)
VALUE% = ASC(test$)
IF VALUE% >= ASC("Z") THEN VALUE% = ASC("A") ELSE VALUE% = VALUE% + 1
retval$ = STRING$(4, CHR$(VALUE%))
Increase$ = retval$

END FUNCTION

[Mac]

I would suggest OPEN "scrn:" when first debugging. That way all output comes to the screen immediately and you don't have to go read files to see if your program is working.

Below is a version that is marginally faster.

Code: Select all

OPEN "scrn:" FOR OUTPUT AS #1
DEFINT I
CONST A = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
FOR I1 = 1 TO 26
  C1$ = MID$(A, I1, 1)
  FOR I2 = 1 TO 26
    C2$ = MID$(A, I2, 1)
    FOR I3 = 1 TO 26
      C3$ = MID$(A, I3, 1)
      FOR I4 = 1 TO 26
        PRINT #1, C1$ + C2$ + C3$ + MID$(A, I4, 1)
      NEXT I4
   NEXT I3
 NEXT I2
NEXT I1
CLOSE
SYSTEM