why true equals 1 in C++ ?

Question

0.00/5 (No votes)

See more:

Well...False is 00000000 so true must be 11111111=-1 in decimal system(255 unsigned)
In all of the other programming languages I know
(not many) true is equal to -1 which makes more sense...
how can NOT(FALSE) be something else than NOT(00000000) ?
Thank you !!

Posted 6-May-14 8:32am

EbolaHost

Add a Solution

Comments

Maciej Los 6-May-14 14:53pm

Sample code would be appreciated.

Richard MacCutchan 6-May-14 15:14pm

Because.

To clarify: FALSE is defined as zero, and TRUE is defined as not zero, or in other words any non-zero value, or expression.

[no name] 6-May-14 15:14pm

Can you cite any reference to any programming language documentation where -1 evaluates to true?

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Answer 1 · 2014-05-06T09:29:00

Solution 2

Some insight here: "comparison operator values C++" at Stack Overflow[^].

Posted 6-May-14 9:29am

CPallini

Kornfeld Eliyahu Peter · Answer 2 · 2014-05-06T08:38:00

Solution 1

Wikipedia:
The comparison operators ('>', '==', etc.) are defined to return a signed integer (int) result, either zero (for false) or 1 (for true)

Posted 6-May-14 8:38am

Kornfeld Eliyahu Peter