[SOLVED] need help with logic operator

[auralius]

hello all
i'm a newbie in java
actually i'm a c++ programmer

but now i think i need help
i have this code in c++:
while((h = hashTab[++j].Key) && (h - HashKeyHi && --i));

all variables are integer

i've got this error message:
operator && cannot be applied to int,int

well, i guess that's why i love c++ so much... :D
any idea what should i do?
how can i deal with this && operator in java?

thanks all...!!!

[Fubarable]

ints can't substitute for booleans in Java as they can in C++. You'll need to put some == and != in there to make it work.

[auralius]

ahh... now i know..
you inspired me...

while(true){
if((h = hashTab[++j].Key) == 0
|| (h - HashKeyHi) == 0
|| (--i) == 0)
break;
}

thanks fubarable...
now i know why i love c++...
:)

[CJSLMAN]

Your initial logic indicated logic "and", yet you implemnted it with logic "or". Shouldn't your code be:

while(true){
if((h = hashTab[++j].Key) == 0 
[B][COLOR="Red"]&&[/COLOR][/B] (h - HashKeyHi) == 0 
[B][COLOR="red"]&&[/COLOR][/B] (--i) == 0)
break;
}

Luck,
CJSL

[auralius]

I don't think so...
first: operator && will return 0 if at least one operand value is zero...

second:looking at my first code... i want it to break out of while loop if at least one of these condition is zero:
-> h = hashTab[++j].Key
-> h - HashKeyHi
-> --i

third: that's why i compare them with zero and use or...

fourth: your code will execute break if all conditions are zero...

fifth: i've tried it... :)

sixth: thanks a lot for your feedback...
i really-really appreciate it...
:D

[CJSLMAN]

I'm not sure we're on the same frecuency here... If the code is doing what you want it to do, then great, but you're statements of logic are not right...

first: operator && will return 0 if at least one operand value is zero...
second:looking at my first code... i want it to break out of while loop if at least one of these condition is zero:
-> h = hashTab[++j].Key
-> h - HashKeyHi
-> --i

The the above statements say the same thing.

third: that's why i compare them with zero and use or...

The "compare with zero" part I agree with, but the "or" part I do not agree with. With "or" all the comparasion statements have to be != 0 before it the while breaks out.

fourth: your code will execute break if all conditions are zero...

Not so... using "&&" is the same condition as the above points one and two.

fifth: i've tried it...

Again, if it's working the way you want it to, that's good.

Luck,
CJSL






Luck,
CJSL

[auralius]

i dont get it... :confused:

With "or" all the comparasion statements have to be != 0 before it the while breaks out.

i used or and compared it with zero...
so if 0==0 ==> true
since i use or, i need only one condition to be true...
[TRUE] OR [DON'T CARE] = TRUE

dont you thik so...:)

Thx...

[CJSLMAN]

Yes, again, I agree with you that with "or" if you have one true statement in your "if", the whole statement is true, but I thought you were look for conditions to "break" out of the "while" loop using "and" logic (as your original code stated).
Before I go on with this discussion (apparently pointless), you want ALL the condition statements to be false (!=0), before you break out of the loop, correct?

while(true){
if((h = hashTab[++j].Key) == 0 
|| (h - HashKeyHi) == 0 
|| (--i) == 0)
break;
}

Thanks,
CJSL

[auralius]

yup....
:D

[CJSLMAN]

Glad it's working for you...

CJSL

[auralius]

Thanks...now if i have other questions, i won't hesitate to ask...
because you people care so much...
thanks again...

:)