O'Reilly logo

Sams Teach Yourself C++ in 24 Hours, Third Edition by Jesse Liberty

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Appendix A. Binary and Hexadecimal

You learned the fundamentals of arithmetic so long ago, it is hard to imagine what it would be like without that knowledge. When you look at the number 145 you instantly see “one hundred and forty-five” without much reflection.

Understanding binary and hexadecimal requires that you re-examine the number 145 and see it not as a number, but as a code for a number.

Start small: Examine the relationship between the number three and “3.” The numeral 3 is a squiggle on a piece of paper; the number three is an idea. The numeral is used to represent the number.

The distinction can be made clear by realizing that three, 3, |||, III, and *** all can be used to represent the same idea of three.

In base 10 (decimal) math ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required