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float, double etc...
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hi
i have in delphi (m$) a type "real". which one corresponds this in cocoa?
thanks 
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Mac Elite
Join Date: Dec 2001
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Originally posted by Dapp:
hi
i have in delphi (m$) a type "real". which one corresponds this in cocoa?
thanks
What values does a real hold? In mathematics, a real number is a rational or irrational number (but not an imaginary number). I don't think this could be what it is in Delphi, since no programming language that I am aware up (save something like Mathematica or Maple) supports irrational number. Does the "real" support decimals? If so, it's a float. If not, I'd guess a double.
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Mac Pro 2x 2.66 GHz Dual core, Apple TV 160GB, two Windows XP PCs
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Senior User
Join Date: Oct 2000
Location: Lawrence, KS
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Cocoa implies Objective-C which implies C.
Therefore, in Cocoa you have all the usual C types and some Cocoa specific wrappers for them i.e. NSNumber, NSDecimal which come in handy for storing numbers in collection classes etc.
What kinds of real numbers are you dealing with? positive or negative integers, decimals, very high precision decimals? C is designed for efficient memory use so it offers you many numerical types.
You could always use a high precision signed decimal type to account for all cases. It just wouldn't be elegant programming.
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Senior User
Join Date: Nov 2001
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Originally posted by Arkham_c:
What values does a real hold? In mathematics, a real number is a rational or irrational number (but not an imaginary number). I don't think this could be what it is in Delphi, since no programming language that I am aware up (save something like Mathematica or Maple) supports irrational number. Does the "real" support decimals? If so, it's a float. If not, I'd guess a double.
Uhh...isn't a double just a higher precision float?
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Mac Elite
Join Date: Dec 2001
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Originally posted by Wevah:
Uhh...isn't a double just a higher precision float?
Yes, double is a high-precision float. I meant to say long but was reading the title while typing and entered it incorrectly.
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Mac Pro 2x 2.66 GHz Dual core, Apple TV 160GB, two Windows XP PCs
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Senior User
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Word. I'd half-thought I'd gone bananas.
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[Wevah setPostCount:[Wevah postCount] + 1];
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Mac Elite
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Originally posted by Arkham_c:
no programming language that I am aware up (save something like Mathematica or Maple) supports irrational number
Haskell, for example.
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[vash:~] banana% killall killall
Terminated
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