1. Start with the positive version of the number:
|-585 099| = 585 099
2. Divide the number repeatedly by 2:
Keep track of each remainder.
We stop when we get a quotient that is equal to zero.
- division = quotient + remainder;
- 585 099 ÷ 2 = 292 549 + 1;
- 292 549 ÷ 2 = 146 274 + 1;
- 146 274 ÷ 2 = 73 137 + 0;
- 73 137 ÷ 2 = 36 568 + 1;
- 36 568 ÷ 2 = 18 284 + 0;
- 18 284 ÷ 2 = 9 142 + 0;
- 9 142 ÷ 2 = 4 571 + 0;
- 4 571 ÷ 2 = 2 285 + 1;
- 2 285 ÷ 2 = 1 142 + 1;
- 1 142 ÷ 2 = 571 + 0;
- 571 ÷ 2 = 285 + 1;
- 285 ÷ 2 = 142 + 1;
- 142 ÷ 2 = 71 + 0;
- 71 ÷ 2 = 35 + 1;
- 35 ÷ 2 = 17 + 1;
- 17 ÷ 2 = 8 + 1;
- 8 ÷ 2 = 4 + 0;
- 4 ÷ 2 = 2 + 0;
- 2 ÷ 2 = 1 + 0;
- 1 ÷ 2 = 0 + 1;
3. Construct the base 2 representation of the positive number:
Take all the remainders starting from the bottom of the list constructed above.
585 099(10) = 1000 1110 1101 1000 1011(2)
4. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 20.
A signed binary's bit length must be equal to a power of 2, as of:
21 = 2; 22 = 4; 23 = 8; 24 = 16; 25 = 32; 26 = 64; ...
The first bit (the leftmost) indicates the sign:
0 = positive integer number, 1 = negative integer number
The least number that is:
1) a power of 2
2) and is larger than the actual length, 20,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 32.
5. Get the positive binary computer representation on 32 bits (4 Bytes):
If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 32.
585 099(10) = 0000 0000 0000 1000 1110 1101 1000 1011
6. Get the negative integer number representation:
To write the negative integer number on 32 bits (4 Bytes),
as a signed binary in one's complement representation,
... replace all the bits on 0 with 1s and all the bits set on 1 with 0s.
Reverse the digits, flip the digits:
Replace the bits set on 0 with 1s and the bits set on 1 with 0s.
-585 099(10) = !(0000 0000 0000 1000 1110 1101 1000 1011)
Number -585 099(10), a signed integer number (with sign), converted from decimal system (from base 10) and written as a signed binary in one's complement representation:
-585 099(10) = 1111 1111 1111 0111 0001 0010 0111 0100
Spaces were used to group digits: for binary, by 4, for decimal, by 3.