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Hello.
How we can define a new basis types?
We know hexadecimal or decimal base and conversions between these types, now how is possible to define a 256 basis type of data?
(e.g. A type for keep the ASCII values)
Thanks.
Posted 2-Jan-13 1:52am
smss IR399
Comments
Richard MacCutchan at 2-Jan-13 7:50am
   
You already have that type: char.
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Solution 1

The 'usual way': define 256 different (ordered) symbols.
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Member 8238193 at 2-Jan-13 7:40am
   
I want to do it without defining the symbols, through having the certain value.
CPallini at 2-Jan-13 7:54am
   
You cannot have a base without thew symbols, for instance, base two has the symbols {'0', '1'} while base hex has {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'}.
If you want instead have a variable type that can hold 256 different values, then, you already have it, it is the char (or the unsigned char).
Member 8238193 at 2-Jan-13 8:08am
   
Can I assuming an array for that symbols? (int array[256];//and in it save the numbers)
CPallini at 2-Jan-13 15:49pm
   
Of course you can.
Member 8238193 at 2-Jan-13 11:51am
   
Doesn't have anyone an idea??
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Solution 2

In C++ there are no separate types for storing hexadecimal or decimal value. Such integral values are all stored in binary types like int or unsigned int, and to show them to the outside world you can convert them into any arbitrary number base by library functions like printf or ltoa.

There is already a basic type in C++ to store ASCII characters: char.

Perhaps I didn't understand your question. Please try to rephrase it.
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Member 8238193 at 2-Jan-13 8:03am
   
Yes, I know these.
I trying to define 256 Basic for a software.
Consider on this e.g:
A_245 = 255
A_245 + 1 = ??
In char types, we have only an one character for holding value and if that number is larger, char type can't keep that, I need a 256 Basic System for counting 256 Basic Numbers from zero to Extreme. Is my expression illustrative?
nv3 at 2-Jan-13 9:10am
   
An unsigned char can hold values from 0 ... 255. Are you trying to construct a data type that holds 0 ... 256? Is that what you mean?
Member 8238193 at 2-Jan-13 10:47am
   
To describe what I mean, let's assume that an unsigned character have the 255 value, I want to add digit "1" and create two digits, For example in decimal basic: 9+1=10 (a digit+ a digit= two digits).
Example: in 256 basic A245 + 1 = A1_1, that A245 is a digit(255 in decimal 1,2,3,...,10,A2,A3,...,A245) and A1_1 is two digits in 256 basic = 1*255^1+1 in decimal.
I want to create a class or a structure or, anything so i can calculating the digits in 256 basic.

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