Homework Help.

ETC Homework & Coursework Questions
1

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:
    Hello,

My name is Jordan and studying at the New Bulgarian University in Sofiya. This is my homework but can not write the last two questions.

  1. Why command exit, placed in a shell script follows:
    (statements; exit)
    will not finish the script? How do you overcome it.

  2. Write a script that calculates the factorial of the number receiving
    as an argument. Suggest variant control arguments.

  3. Relevant commands, code, scripts, algorithms:

  4. The attempts at a solution (include all code and scripts):

  5. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):

New Bulgarian University, Sofiya. Teacher is N. Gadjev. Faculty number F49086

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).

2

The brackets cause the two commands to be executed in a subshell. Therefore the "exit" will only exit the subshell not the calling shell.

We need to tell the calling program that we want to exit. One way is to exit with a non-zero status and test that value in the calling script.

(statements; exit 2) ; REPLY=$?
if [ $REPLY -eq 2 ]
then
     exit
fi
3

simple factorial script:

#! /bin/ksh
n=$1
i=0
fact=1
while ((i<n)) ; do
        ((i=i+1))
        ((fact=fact*i))
done
echo $fact
exit 0