How to Enable Scroll Bar of QBasic Output Window? - scroll

Question

I'm trying to display a statement 1000 times in QBASIC (using for statement). I think the program works properly, but I cannot see the 1000 statements because I cannot scroll up and down in the output window of QBASIC. I can see only the last part of the 1000 statements.
FOR x = 1 TO 1000
PRINT "maydie";
PRINT
NEXT x

Answer 1

That will be very hard. For QBasic you have to know how PRINT works. Than with look you could write an TSR program that does what you want in some other language. Alternative is store everything in array and create you own display routine with scrolling. But with 1000 lines will run into memory restrictions

Answer 2

In short, unless you're using a modern take on QBasic, you can't.
What you can do is print the output to a text file:
OPEN "C:\somefile.txt" FOR OUTPUT AS #1
FOR x = 1 TO 1000
PRINT #1, "maydie":
PRINT
NEXT x
This will write "maydie" to C:\somefile.txt 1000 times. Then use some text editor to view the output. You could even use a program to count the lines of text, something like OPEN "C:|somefile.txt" FOR INPUT AS #1: WHILE NOT EOF(1): INPUT #1, junk$: i = i + 1: WEND: PRINT "There were " + STR$(i) + " lines."

Answer 3

Though the other answerers are correct in saying that it is not inbuilt and hence not possible, I agree that this is very desirable! Consequently, I have time and time again devised scripts based on the following:
DIM text(1 to 1000) AS STRING
'Define text below: Here I've just defined it as every line being
'"maydie" with the value of the line number, but it could be whatever.
FOR i = 1 TO 1000
text(i) = STR$(i) + "maydie"
NEXT i
CLS
position% = 0
FOR i = 1 to 25
LOCATE i, 1: PRINT text(i); SPACE$(80 - LEN(text(i)));
NEXT i
DO
x$=INKEY$
IF x$ <> "" THEN
SELECT CASE x$
CASE CHR$(0) + CHR$(72) 'Up arrow
position% = position% - 1
IF position% < 0 THEN position% = 0
CASE CHR$(0) + CHR$(80) 'Down arrow
position% = position% + 1
IF position% > 975 THEN position% = 975
CASE CHR$(0) + "I" 'Page Up
position% = position% - 24
IF position% < 0 THEN position% = 0
CASE CHR$(0) + "Q" 'Page Down
position% = position% + 24
IF position% > 975 THEN position% = 975
CASE CHR$(27) 'ENDS the Program on ESC key.
END
END SELECT
FOR i = 1 to 25
LOCATE i, 1: PRINT text(i + position%); SPACE$(80 - LEN(text(i + position%)));
NEXT i
END IF
LOOP
Tested and works! If you want to use it multiple times in your program for multiple different text blocks, you can just turn it into a function and pass it the variables you want.