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Set Boolean Variable to opposite, eg if true, set to false, and vice versa.

General and Gameplay Programming Programming

Started by utilae June 25, 2006 10:04 PM

12 comments, last by Aardvajk 17 years, 9 months ago

utilae

188

Author

June 25, 2006 10:04 PM

Hi, I am using C++. I have the following code


   if(m_bSelected==true)//toggle boolean variable
       m_bSelected=false;
   else
       m_bSelected=true;

Is there some simpler way to make a boolean variable such as m_bSelected be set to the opposite of what it is set to (eg if true, then set to false, vice versa).

HTML5, iOS and Android Game Development using Corona SDK and moai SDK

Anonymous

June 25, 2006 10:06 PM

mbSelected = !mbSelected

intrest86

742

June 25, 2006 10:06 PM

I usually just do

m_bSelected = !m_bSelected;

Turring Machines are better than C++ any day ^_~

Sr_Guapo

876

June 25, 2006 10:06 PM

m_bSelected = !m_bSelected;

Edit: wow 3 posts in 8 seconds...

Sean Henley [C++ Tutor]Rensselaer Polytechnic Institute

raz0r

586

June 25, 2006 10:06 PM

bool b = true;

b = !b; //false
b = !b; //true

Edit: Wow, nice timing =)

TANSTAAFL

1,160

June 25, 2006 10:07 PM

In case this isn't a joke, here:

m_bSelected = !m_bSelected;

Get off my lawn!

TANSTAAFL

1,160

June 25, 2006 10:09 PM

In the case that this *IS* a joke:

m_bSelected = m_bSelected ^^ true;m_bSelected = m_bSelected ? false : true;m_bSelected = (bool)((((int)m_bSelected)+1)&1);

Get off my lawn!

TANSTAAFL

1,160

June 25, 2006 10:11 PM

Quote:Original post by Sr_Guapo
Edit: wow 3 posts in 8 seconds...

Yeah, somebody finally asked a question we all knew.

Get off my lawn!

utilae

188

Author

June 25, 2006 10:32 PM

Thanks everyone.

I just knew there would be a one line version of that code.

Thanks.

HTML5, iOS and Android Game Development using Corona SDK and moai SDK

JohnBolton

1,373

June 26, 2006 12:44 AM

Quote:Original post by TANSTAAFL
In the case that this *IS* a joke:

m_bSelected = m_bSelected ^^ true;

Ummm, ^^ is not an operator. Or was that the joke?

John BoltonLocomotive Games (THQ)Current Project: Destroy All Humans (Wii). IN STORES NOW!

Set Boolean Variable to opposite, eg if true, set to false, and vice versa.

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Set Boolean Variable to opposite, eg if true, set to false, and vice versa.

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