I could use some help with some things.whats the difference between,
if (a & b)
flag = 0;
else flag = 1;
if (a && b)
flag = 0;
else flag = 1;
Also, anyone know a C program which takes a stream of keyboard characters as input, and filters out blanks. cheers people.
& is a bitwise operation, && is a boolean operation.
boolean operation is one where the result is true or false, 1 or 0 essentially
bitwise does the same thing with each bit.
5 & 4 for instance is
00000101
00000100
-------------
00000100 = 4
"You are stupid! You are stupid! Oh, and don't forget, you are STUPID!" - Dexter
I though I knew C code, but this boggles my mind!!!!!
The difference is the first conditional performs a bitwise AND on a and b and provides no real boolean result while the second asks if both a and b are true.
Filtering blanks from a string (which you will take from your stream or whatever) is as simple as looping though the array of characters and copying everything that isn't a space (or any whitespace if you wish) over to a new string or buffer.
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could do that with sed. but you could write one pretty easily too.Originally Posted by snapsleftguitar
example:
sed -e 's/[ \t]//g'
Last edited by FillYourBrain; 08-13-2006 at 11:29 AM.
"You are stupid! You are stupid! Oh, and don't forget, you are STUPID!" - Dexter
a = 1, b = 2
You get completely opposite answers if you choose & instead of &&
flag = !(a && b);
also works.
> anyone know a C program which takes a stream of keyboard characters as input
Yeah, a whole bunch of people. But you start by posting your attempt, then we suggest what to do next.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Nah this guy is going through his homework and trying to cleverly post threads about having problems with this or that just to get answers.
