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double to byte convertion

 
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Good morning to all

How is it work?
 
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Specifically...?
 
Craig Bayley
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Are you having peoblems with the output of -64?

Its a rollover thing..byte rages between -128 and +127 inclusive.

Have you played with the numbers used? Try these:
456831
456832

They should illustrate what I mean.

Post again if still confused, or if I'm getting the wrong end of the proverbial stick.
 
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The number 456896 looks like this in binary: 1101111100011000000

By casting it to a byte, you throw away everything but the lower 8 bits: 11000000
The value 11000000 is -64.
 
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