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Hello someone can help me with the following question ?
Example I have an aob that represents an item (cigarette) in a game ...
XX XX XX XX XX XX XX = cigarette
Xx XX XX XX XX XX XX XX 01 = 1 cigarette
XX XX XX XX XX XX XX XX 0A = 10 cigarettes
How to turn the item value into a negative value?
XX XX XX XX XX XX XX XX ?? = -10 cigarettes
If anyone can help me with that, I’d appreciate it
Thank you
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Try to do with Complement of 2 in binary.
Transform the value you want to convert into binary: 0A = 1010
Now do the inversion (NOT) of the binary, that is, the where is 0 will be and 1 and the where is 1 will be 0:
1010 = 0101
Some +1 in the result: 0101 + 0001 = 0110 and will have its negative number in binary: 0110.
The problem now is the identification of a "normal" number (pure binary) and a negative number (0110 in normal torque is 6). To solve this problem, the rest of the bits have to be used, for example:
The number 10 in 8 bits is: 0000 1010, when doing the inversion will be 1111 0101, sum +1 and will be 1111 0110, ready, this is -10 negative and "identified" in binary (number 6 is 0000 0110). Meanwhile doesn’t work for everyone the types of values.
For example: in the case of a int Signed that "reserves a space" for the identification of negative numbers, this operation would work normally. But with a int unsigned (where you do not have the "reserve" for a negative number), this would not work and the result would be 246.
Now with your value, come on:
Turns to binary:
0000 0000 0000 000A = 0000 0000 0000 1010
Does the inversion:
0000 0000 0000 1010 = 1111 1111 1111 0101
Sum +1:
1111 1111 1111 0101 + 0001 = 1111 1111 1111 0110
Now with binary negative number on hand, just turn to Hexadecimal: FFFF FFFF FFFF FFF6.
The result of -10 is FFFF FFFF FFFF FFF6. Try using this value in your Aob.
Browser other questions tagged hexadecimal
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