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Download e-book for iPad: 101 Apple Computer Programming Tips and Tricks by Fred White

By Fred White

ISBN-10: 0866680152

ISBN-13: 9780866680158

Booklet via White, Fred

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Additional resources for 101 Apple Computer Programming Tips and Tricks

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If you scored a victory and got an R+1 atline170,the program jumps to line 200 where it stops to display your total right and wrong score. After that, it's back to line 20 for a complete new runthrough. " :GOTO 200 180 PRINT"NO! • " 220 PRINT R;" RIGHT AND ";W;" WRONG" 230 PRINT:GOTO 20 300 DATA BUTLER,NANNY,GARDNER,BURGLAR,SON, WIFE 21 Wi nner's Message Flashing lights. Ringing beils. This message to hail a win in agame really attracts attention! Use it at an appropriate point in your game. It will print the message YOU WIN on the video screen with a solidbar underline, and ring a bell.

Use the interesting PEEK instruction. This short program allows a search of memory locations. You should change the numbers in line 20 to encompass whatever memory locations you wish to search . As written, the program will cause the computer to reveal the contents of locations 1000 to 1100. It could just as weil be 100 to 200 for which you would substitute the expression : FOR M = 100 TO 200 or 10,000 to 10,100 for wh ich you would use the expression: FOR M = 10000 TO 10100 These substitutions are at line 20, of course.

You will be able quickly to tell what each number prints. Une 40 is a timing loop to slow down the presentation so you can digest the information. To make it even slower, increase the number 400 in line 40. To make it taster, decrease the number 400 in line 40. The computer's chime will ring after it reaches 255. Une 60 provides the beep. By the way, it also will beep when N 70 in line 30 and when N 135 in line 30. = = 49 Program Listing lOH OM E 20 FOR N=0 TO 255 30 PRINT N,CHR$(N) 40 FOR L=l TO 400:NEXT L 50 NEXT N 60 PRINT CHR$(7) 37 Memory Peek Want a quick look into a specific memory location?

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101 Apple Computer Programming Tips and Tricks by Fred White

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