Skip to Content
C++ How to Program, 10/e
book

C++ How to Program, 10/e

by Paul Deitel, Harvey Deitel
February 2016
Beginner
1080 pages
207h 57m
English
Pearson
Content preview from C++ How to Program, 10/e

D.6 Negative Binary Numbers: Two’s Complement Notation

The discussion so far in this appendix has focused on positive numbers. In this section, we explain how computers represent negative numbers using two’s complement notation. First we explain how the two’s complement of a binary number is formed, then we show why it represents the negative value of the given binary number.

Consider a machine with 32-bit integers. Suppose


int value = 13;

The 32-bit representation of value is


00000000 00000000 00000000 00001101

To form the negative of value we first form its one’s complement by applying C++’s bitwise complement operator (~):


onesComplementOfValue = ~value;

Internally, ~value is now value with each of its bits reversed—ones become zeros ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

C++ How to Program, Sixth Edition

C++ How to Program, Sixth Edition

P. J. Deitel - Deitel & Associates, Inc., H. M. Deitel - Deitel & Associates, Inc.
C++ How to Program, Ninth Edition

C++ How to Program, Ninth Edition

Paul Deitel, Harvey Deitel

Publisher Resources

ISBN: 9780134448930Purchase book