What are the required steps to convert base 10 integer
number 192 168 222 863 to signed binary code (in base 2)?
- A signed integer, written in base ten, or a decimal system number, is a number written using the digits 0 through 9 and the sign, which can be positive (+) or negative (-). If positive, the sign is usually not written. A number written in base two, or binary, is a number written using only the digits 0 and 1.
1. Divide the number repeatedly by 2:
Keep track of each remainder.
Stop when you get a quotient that is equal to zero.
- division = quotient + remainder;
- 192 168 222 863 ÷ 2 = 96 084 111 431 + 1;
- 96 084 111 431 ÷ 2 = 48 042 055 715 + 1;
- 48 042 055 715 ÷ 2 = 24 021 027 857 + 1;
- 24 021 027 857 ÷ 2 = 12 010 513 928 + 1;
- 12 010 513 928 ÷ 2 = 6 005 256 964 + 0;
- 6 005 256 964 ÷ 2 = 3 002 628 482 + 0;
- 3 002 628 482 ÷ 2 = 1 501 314 241 + 0;
- 1 501 314 241 ÷ 2 = 750 657 120 + 1;
- 750 657 120 ÷ 2 = 375 328 560 + 0;
- 375 328 560 ÷ 2 = 187 664 280 + 0;
- 187 664 280 ÷ 2 = 93 832 140 + 0;
- 93 832 140 ÷ 2 = 46 916 070 + 0;
- 46 916 070 ÷ 2 = 23 458 035 + 0;
- 23 458 035 ÷ 2 = 11 729 017 + 1;
- 11 729 017 ÷ 2 = 5 864 508 + 1;
- 5 864 508 ÷ 2 = 2 932 254 + 0;
- 2 932 254 ÷ 2 = 1 466 127 + 0;
- 1 466 127 ÷ 2 = 733 063 + 1;
- 733 063 ÷ 2 = 366 531 + 1;
- 366 531 ÷ 2 = 183 265 + 1;
- 183 265 ÷ 2 = 91 632 + 1;
- 91 632 ÷ 2 = 45 816 + 0;
- 45 816 ÷ 2 = 22 908 + 0;
- 22 908 ÷ 2 = 11 454 + 0;
- 11 454 ÷ 2 = 5 727 + 0;
- 5 727 ÷ 2 = 2 863 + 1;
- 2 863 ÷ 2 = 1 431 + 1;
- 1 431 ÷ 2 = 715 + 1;
- 715 ÷ 2 = 357 + 1;
- 357 ÷ 2 = 178 + 1;
- 178 ÷ 2 = 89 + 0;
- 89 ÷ 2 = 44 + 1;
- 44 ÷ 2 = 22 + 0;
- 22 ÷ 2 = 11 + 0;
- 11 ÷ 2 = 5 + 1;
- 5 ÷ 2 = 2 + 1;
- 2 ÷ 2 = 1 + 0;
- 1 ÷ 2 = 0 + 1;
2. Construct the base 2 representation of the positive number:
Take all the remainders starting from the bottom of the list constructed above.
192 168 222 863(10) = 10 1100 1011 1110 0001 1110 0110 0000 1000 1111(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 38.
- 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) is reserved for 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, 38,
3) so that the first bit (leftmost) could be zero
(we deal with a positive number at this moment)
=== is: 64.
4. Get the positive binary computer representation on 64 bits (8 Bytes):
If needed, add extra 0s in front (to the left) of the base 2 number, up to the required length, 64:
192 168 222 863(10) Base 10 integer number converted and written as a signed binary code (in base 2):
192 168 222 863(10) = 0000 0000 0000 0000 0000 0000 0010 1100 1011 1110 0001 1110 0110 0000 1000 1111
Spaces were used to group digits: for binary, by 4, for decimal, by 3.