What are the required steps to convert base 10 integer
number 1 100 111 011 057 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;
- 1 100 111 011 057 ÷ 2 = 550 055 505 528 + 1;
- 550 055 505 528 ÷ 2 = 275 027 752 764 + 0;
- 275 027 752 764 ÷ 2 = 137 513 876 382 + 0;
- 137 513 876 382 ÷ 2 = 68 756 938 191 + 0;
- 68 756 938 191 ÷ 2 = 34 378 469 095 + 1;
- 34 378 469 095 ÷ 2 = 17 189 234 547 + 1;
- 17 189 234 547 ÷ 2 = 8 594 617 273 + 1;
- 8 594 617 273 ÷ 2 = 4 297 308 636 + 1;
- 4 297 308 636 ÷ 2 = 2 148 654 318 + 0;
- 2 148 654 318 ÷ 2 = 1 074 327 159 + 0;
- 1 074 327 159 ÷ 2 = 537 163 579 + 1;
- 537 163 579 ÷ 2 = 268 581 789 + 1;
- 268 581 789 ÷ 2 = 134 290 894 + 1;
- 134 290 894 ÷ 2 = 67 145 447 + 0;
- 67 145 447 ÷ 2 = 33 572 723 + 1;
- 33 572 723 ÷ 2 = 16 786 361 + 1;
- 16 786 361 ÷ 2 = 8 393 180 + 1;
- 8 393 180 ÷ 2 = 4 196 590 + 0;
- 4 196 590 ÷ 2 = 2 098 295 + 0;
- 2 098 295 ÷ 2 = 1 049 147 + 1;
- 1 049 147 ÷ 2 = 524 573 + 1;
- 524 573 ÷ 2 = 262 286 + 1;
- 262 286 ÷ 2 = 131 143 + 0;
- 131 143 ÷ 2 = 65 571 + 1;
- 65 571 ÷ 2 = 32 785 + 1;
- 32 785 ÷ 2 = 16 392 + 1;
- 16 392 ÷ 2 = 8 196 + 0;
- 8 196 ÷ 2 = 4 098 + 0;
- 4 098 ÷ 2 = 2 049 + 0;
- 2 049 ÷ 2 = 1 024 + 1;
- 1 024 ÷ 2 = 512 + 0;
- 512 ÷ 2 = 256 + 0;
- 256 ÷ 2 = 128 + 0;
- 128 ÷ 2 = 64 + 0;
- 64 ÷ 2 = 32 + 0;
- 32 ÷ 2 = 16 + 0;
- 16 ÷ 2 = 8 + 0;
- 8 ÷ 2 = 4 + 0;
- 4 ÷ 2 = 2 + 0;
- 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.
1 100 111 011 057(10) = 1 0000 0000 0010 0011 1011 1001 1101 1100 1111 0001(2)
3. Determine the signed binary number bit length:
The base 2 number's actual length, in bits: 41.
- 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, 41,
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:
1 100 111 011 057(10) Base 10 integer number converted and written as a signed binary code (in base 2):
1 100 111 011 057(10) = 0000 0000 0000 0000 0000 0001 0000 0000 0010 0011 1011 1001 1101 1100 1111 0001
Spaces were used to group digits: for binary, by 4, for decimal, by 3.