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1. The problem statement, all variables and given/known data:
Execute command with integer list arguments such as myScript 8 7 2 3.
Take those arguments and square all of them one by one, each iteration print out the result. At the end print out the total sum of the squared values.
2. Relevant commands, code, scripts, algorithms:
I want to output an error message when characters are found inside the argument list.
3. The attempts at a solution (include all code and scripts): 4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
Athabasca University, Athabasca, Alberta, Canada, Prof. Mamoud Abaza, COMP325
Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
Congrats! You are almost there and you lack only small things.
Here are some pointers:
1. You haven't said anything about the shell you are using but somehow i doubt you are using a Bourne shell. More likely "/bin/sh" is a POSIX shell, a bash (Bourne Again Shell) or a ksh (Korn Shell). All these shells have an arithmetic facility and while what you do is syntactically correct using "expr" like you do is ancient, antiquated, deprecated and ultimately discouraged. See the "(( ... ))" in the man page of your shell and you will understand why.
2. The same goes for backticks: modern shells understand these only for purposes of backwards compatibility and using them has no advantages but a lot of disadvantages. Have a look in the man page for "$( ... )" as a device to execute a command in a subshell.
3. Your handling of the "num" variable: All usual shells allow variables to be used without having to declare them (unlike languages like C or PASCAL), but it is still good style to declare properly what you use prior to using it. Again, what you do is syntactically correct, but .... Using a line like
at the start of the script allows you to: give the variables a proper type, a sensible starting value and - even more important - to document their usage. If you look later at your code you will immediately know what you did by simply reading the comments.
OK, lets talk about this, then go on as you correct these errors. I will expand on this later.
..All these shells have an arithmetic facility and while what you do is syntactically correct using "expr" like you do is ancient, antiquated, deprecated and ultimately discouraged. See the "(( ... ))" in the man page of your shell and you will understand why.
The reason I use the expr command is because I have to; that is part of the assignment.
All I want to do is to use reg expressions to check whether the user typed in strings instead of integers. It seems that I don't get the regular expression to work in my control flow statements. Thats all I want to do
Hi All,
I am trying to find out number of cores present for hp-ux server from the output of print_manifest (as shown below). i suppose awk will be best tool to use for filtering.
output of print_manifest is :
System Hardware
Model: ia64 hp Integrity Virtual Partition
... (6 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Devise a chain of filters using some or all of the following programs pr, cut, cat, tail to
display a numbered... (8 Replies)
hi, can someone how to accept command line arguments as a variable using in script?
like: ./scriptname arguments
by accept arguments, I can use it in my script?
thx! (1 Reply)
I have ran into a small issue and I am not sure how to fix it.
In one of our current scripts we have this line which does a grep to get the pid of the process.
ps -ef | grep nco_p_syslog | grep $x | awk '{print $2}'
However this is not returning anything due to the how long the value... (7 Replies)
I am working on a script wherein i need the user to enter the Build ID
for eg:the command line will show
enter the build ID
Now on entering the build ID it should be assigned to @ARGV.
How can this be done.? (1 Reply)
Hi Expert,
May I know how to filter `last` command out put for yesterday only ?
my `last` command out put:
user1 pts/3 192.168.0.12 Wed Jun 25 03:58 still logged in
user1 pts/3 192.168.0.33 Wed Jun 23 02:08 - 09:58 (00:49)
user2 pts/1 192.168.0.21 ... (1 Reply)
Hello All,
I want to build some monitoring of processes in HP-UX 11.x.
Is there any way to get the whole set of commands and arguments instead of the first 60 characters? I read that there's a limitation of the ps -ef command that we can't overcome. In this case is there any other command... (17 Replies)
Hi all,
How many arguments can we pass while testing a prgm at command line..
I encountered an issue while passing 10 arguments.
For $10 its taking argument passed for $1 followed by 'zero'.
can we pass more than 9 arguments /Is there any other way.
Thanks,
rrs (6 Replies)
Hi!
$ more file
yoyo haha lili
...
i want to test if a "grep yoyo AND lili" works in this file.
In fact, my script will carry on only if it finds in the same line "yoyo" AND "lili"
How can i do?
Thx! (3 Replies)