2's complement of a Decimal number, without converting it to binary form?
Question
How can I convert eg n=52 (110100) into a decimal number which represents its 2's complement (ie, 12 (001100))? Is there a formula/trick using bit manipulation (using C++)?
1 answers
solution1
1 2021-07-29 05:14:08
If x-bit number then, 2^x - n will give you the 2's complement of n in decimal.
In your case, you considered 6-bit numbers, so 64 - 52 = 12 is the 2's complement of 52 .
Also note that 52 should be interpreted as -12 in signed 6-bit notation represented in 2's complement.
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