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Message: <blockquote data-quote="Nisala88" data-source="post: 9542170" data-attributes="member: 8045">1's complement representationAlternatively, a system known as ones' complement can be used to represent negative numbers. The ones' complement form of a negative binary number is the bitwise NOT applied to it — the "complement" of its positive counterpart. Like sign-and-magnitude representation, ones' complement has two representations of 0: 00000000 (+0) and 11111111 (−0).As an example, the ones' complement form of 00101011 (43) becomes 11010100 (−43). The range of signed numbers using ones' complement is represented by −(2 to the power (n−1)−1) to +(2 to the power (n−1)−1) and ±0. A conventional eight-bit byte is −127 subscript 10 to +127 subscript 10 with zero being either 00000000 (+0) or 11111111 (−0).To add two numbers represented in this system, one does a conventional binary addition, but it is then necessary to add any resulting carry back into the resulting sum. To see why this is necessary, consider the following example showing the case of the addition of −1 (11111110) to +2 (00000010).<img src="http://i56.tinypic.com/9gas0z.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />In the previous example, the binary addition alone gives 00000000, which is incorrect. Only when the carry is added back in does the correct result (00000001) appear.mekanam gaththe WIKI walin, text book eke thiyena theory eka meeta wada amarui.</blockquote>

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