Compute's First Book of Atari by The Editors of COMPUTE! Magazine

By The Editors of COMPUTE! Magazine

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Example text

11 [1: TEST. DATu 70 Fffi 1=0 TO 8 00 GET #1, A 90 "7' A, CHR:t( A) 100 t~'

One other disadvantage is that, shou ld a variable name be no longer needed, or accidentally entered due to a typo, there is no qu ick way to remove that variable from the variable name li st and reuse the 8 bytes reserved for it. Apparently, the only way to get rid of unwanted variables is to LIST the program to cassette or disk. For example, LIST "c" will list the program to cassette. Once the program is saved, use the NEW command to clear the old program. Then use the ENTER command to reload the program.

In yo ur m ain program, this dummy string should be dimensio n ed just before dimension ing the strings and arrays th at you will late r clea r, as was don e in statements 120 a nd 150. This allows the use of the ADR funct io ns to find th e end of the array area to be saved. The reaso n th e UNDIMEN SION routine is not executed by a GOSUB is that th e return line number is lost in t h e clearing process. Loop parameters will also be lost , so the ro ut ine sh ou ldn't be executed wh il e in a FOR ..

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