05-22-2008
Thanks! I didn't realize people were finding these numbers on personal computers, I guess I may make the leader board considering each core has 4 GB of memory
7 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hi folks,
Here i have written a shell script to calculate a maximum number from 10 numbers entered on command line.
max=0
echo Enter 10 numbers , one at a time
for i in 1 2 3 4 5 6 7 8 9 10
do
read n
max=`expr $max + $n`
if --- At this last step there is some problem, it gives error... (5 Replies)
Discussion started by: rits
5 Replies
2. UNIX for Dummies Questions & Answers
Here's my work of testing whether a number input is perfect or not..
echo Enter a number
read no
i=1
ans=0
while
do
if
then
ans='expr $ans + $i'
fi
i='expr $i + 1'
done
if
then
echo $no is perfect
else
echo $no is NOT perfect
fi (12 Replies)
Discussion started by: Cyansnow
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3. Shell Programming and Scripting
Hello,
I have some extra time at work and I'm trying to come up with a good prime number generator for very large numbers that can take advantage of multiple (hundreds) cores. I realize Perl may not be the best solution for this, any ideas?
Thanks! (1 Reply)
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4. Solaris
I was just checking to see if anyone had a script that would allow me to go from port number to program name. I tried to create my own script but it looks like it only works for IPv4 sockets and it looks like daemons such as sshd return as AF_INET6 (in pfiles) for some reason. I can fix my script... (0 Replies)
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5. Programming
The problem I'm having is that when you put in the two numbers the answer is just prime.... nothing. I cannot figure this out ive been working on this forever, can someone please god just tell me how to fix this without encrypted "hints".
#include <iostream>
#include <cmath>
using... (3 Replies)
Discussion started by: c++newb
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6. Shell Programming and Scripting
Can anybody tell me why the second part of this script (Sieve of Eratosthenes) isn't working properly. This isnt coursework or homework just private studies ( Yes Project Euler began it ) I know there are easier ways of doing this too but I want to do it this way.:p
Iam using Cygwin on Vista... (3 Replies)
Discussion started by: drewann
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7. UNIX for Beginners Questions & Answers
I have a factor program that runs and outputs to stdout all the prime numbers that are specified in the given paramters, in this case 30000000-31000000.
Command:
factor/factor 30000000-31000000
Sample output:
30999979 = 30999979
30999980 = 2^2 5 11 140909
30999981 = 3 10333327... (6 Replies)
Discussion started by: steezuschrist96
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less(3pm) Perl Programmers Reference Guide less(3pm)
NAME
less - perl pragma to request less of something
SYNOPSIS
use less 'CPU';
DESCRIPTION
This is a user-pragma. If you're very lucky some code you're using will know that you asked for less CPU usage or ram or fat or... we just
can't know. Consult your documentation on everything you're currently using.
For general suggestions, try requesting "CPU" or "memory".
use less 'memory';
use less 'CPU';
use less 'fat';
If you ask for nothing in particular, you'll be asking for "less 'please'".
use less 'please';
FOR MODULE AUTHORS
less has been in the core as a "joke" module for ages now and it hasn't had any real way to communicating any information to anything.
Thanks to Nicholas Clark we have user pragmas (see perlpragma) and now "less" can do something.
You can probably expect your users to be able to guess that they can request less CPU or memory or just "less" overall.
If the user didn't specify anything, it's interpreted as having used the "please" tag. It's up to you to make this useful.
# equivalent
use less;
use less 'please';
"BOOLEAN = less->of( FEATURE )"
The class method "less->of( NAME )" returns a boolean to tell you whether your user requested less of something.
if ( less->of( 'CPU' ) ) {
...
}
elsif ( less->of( 'memory' ) ) {
}
"FEATURES = less->of()"
If you don't ask for any feature, you get the list of features that the user requested you to be nice to. This has the nice side effect
that if you don't respect anything in particular then you can just ask for it and use it like a boolean.
if ( less->of ) {
...
}
else {
...
}
CAVEATS
This probably does nothing.
This works only on 5.10+
At least it's backwards compatible in not doing much.
perl v5.12.1 2010-04-26 less(3pm)