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Newcomers DBPro Corner / Stored Integers in files - Binary data and Bytes.. help!!

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RedRain
21
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Joined: 11th Jun 2003
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Posted: 22nd Oct 2003 19:01
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I basically want to read a tile map in from a seperate file source which will essentially be a sequential list of integers. I'm just trying to understand how the values are stored in the file. Take for example the number 500,000. This will be stored as 3 bytes of values 32,161, and 7.

How does this work?

All I can get back to is 496,262 from this number set. E.G:

(7*255) = 1785
1785 + 161 = 1946
(1946 * 255) = 496,230
496,230 + 32 = 496,262

I really don't understand binary and whatever that well. Any help will be much appreciated!!
cheers!
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RedRain
21
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Joined: 11th Jun 2003
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Posted: 22nd Oct 2003 19:21
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Hang on I just got it... You multiply by 256 thus:

(7*256) = 1792
1792 + 161 = 1953
(1953 * 256) = 499,968
499,968 + 32 = 500,000

So can anyone tell me why you multiply by 256, when the max byte size is 255?

Never was much good at maths..
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