Yet another question.

[Doc]

what's the value of ~(char)(!!9) ? Again, good luck.

[Adrian]

are u ATIPROCHARGEDGM on LS1.com??

 

im ELS1 from the forums

 

found this here: http://www.ls1.com/forums/showthread.php?threadid=127788

 

 

[Doc]

Yep.

[PlanetCpp]

first off the !!9 = 1 . ! (not operator) returns 0 if the value is non-zero, so !9 = 0 !!9 = !0 = 1, or the same as saying if not 9 = 0 in the possible answers of 0 and 1, then not not 9 must equal 1. !!!9 would then = 0 and !!!!9 = 1, and so on.

the ~ (tilde) operator is a bit-wise one's complement, which is very easy just invert all the bits

!0001100 = 1110011

so lets assume you have a one byte value, which when you said (char), makes it. it equals one (0000 0001) now if you perform a one's complement on that number you should get

1111 1110 which would be either 254 or -2 , negative numbers in binary or such a pain

you have to know when your dealing with them in assembly, c++ and other high languages take care of this for you, thats why you have to specify signed/unsigned if you need the extra space cause in signed variables the last bit is needed as the sign bit, 1 = negative, 0 = positive.

[P_Rog]

i was wondering why a link to this place was on the corral.net forums...but im glad i saw it.

[fafalone]

Adrian is very active on that forum and offered to post on it on behalf of this site. We very much appreciate it

[Doc]

What about this thread on corral ? Give me the link.