Hi,
I was just wondering if anyone has, or knows where to download a prime number finder program. I would like a fairly simple bash program, and also I would like one that could take advantage of multiple processors. I have 500 cores I can use, and would like to take advantage of them using a... (2 Replies)
Hi All,
I have a file of the following format.
<?xml version='1.0' encoding='utf-8'?>
<tomcat-users>
<role rolename="tomcat"/>
<role rolename="role1"/>
<role rolename="manager"/>
<role rolename="admin"/>
<user username="tomcat" password="tomcat" roles="tomcat"/>
<user... (5 Replies)
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)
I've got an aix-box somewhere on the network and a PC on my desk. Nothing fancy so far.
The PC is made dual-boot:
- windowsXP with putty & winSCP
or
- slackware 13 with xfce4 installed.
The aix-box runs DB2 v8.2 and I've installed db2top to monitor the database.
db2top is a character... (0 Replies)
i am having a problem finding the lowest number after punching in a bunch of numbers in the .txt file but its probably the way i have the code set up.
help please! (4 Replies)
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)
I want to print only the lines that meet the criteria : "worde:" and "wordo;"
I got this far:
sed -n '/\(*\)\1e:\1o;/p;'
But it doesn't quite work.
Can someone please perfect it and tell me exactly how its a fixed version/what was wrong with mine?
Thanks heaps, (1 Reply)
Hi
I have a file with number of entries
name 1 123
name 1 345
name 1 65346
name2 3243
name2 24234
name 2 234234
so on .........
how to count total number of entries for name 1 and name2...and so on Please guide. (1 Reply)
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
6 Replies
LEARN ABOUT BSD
expr
EXPR(1) General Commands Manual EXPR(1)NAME
expr - evaluate arguments as an expression
SYNOPSIS
expr arg ...
DESCRIPTION
The arguments are taken as an expression. After evaluation, the result is written on the standard output. Each token of the expression is
a separate argument.
The operators and keywords are listed below. The list is in order of increasing precedence, with equal precedence operators grouped.
expr | expr
yields the first expr if it is neither null nor `0', otherwise yields the second expr.
expr & expr
yields the first expr if neither expr is null or `0', otherwise yields `0'.
expr relop expr
where relop is one of < <= = != >= >, yields `1' if the indicated comparison is true, `0' if false. The comparison is numeric if
both expr are integers, otherwise lexicographic.
expr + expr
expr - expr
addition or subtraction of the arguments.
expr * expr
expr / expr
expr % expr
multiplication, division, or remainder of the arguments.
expr : expr
The matching operator compares the string first argument with the regular expression second argument; regular expression syntax is
the same as that of ed(1). The (...) pattern symbols can be used to select a portion of the first argument. Otherwise, the
matching operator yields the number of characters matched (`0' on failure).
( expr )
parentheses for grouping.
Examples:
To add 1 to the Shell variable a:
a=`expr $a + 1`
To find the filename part (least significant part) of the pathname stored in variable a, which may or may not contain `/':
expr $a : '.*/(.*)' '|' $a
Note the quoted Shell metacharacters.
SEE ALSO sh(1), test(1)DIAGNOSTICS
Expr returns the following exit codes:
0 if the expression is neither null nor `0',
1 if the expression is null or `0',
2 for invalid expressions.
7th Edition April 29, 1985 EXPR(1)