Visit Our UNIX and Linux User Community


statement


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting statement
# 1  
Old 03-08-2007
statement

I want to write a program that would convert yard to feet and feet to yard.
i.e
1 yard = 3 * feet
Echo "enter a"
read a
expr a *3

The trick is that I want to give the user some options. After the conversion from yard to feet is done, I want to ask the user whether or not he/she wants to also convert from feet to yard. If the user says yes, then the script should be executed and the conversion from feet to yard done. But the user says no, the program should stop and exit out.

I need some ideas.
# 2  
Old 03-08-2007
Quote:
Originally Posted by Ernst
I want to write a program that would convert yard to feet and feet to yard.
i.e
1 yard = 3 * feet
Echo "enter a"
read a
expr a *3

The trick is that I want to give the user some options. After the conversion from yard to feet is done, I want to ask the user whether or not he/she wants to also convert from feet to yard. If the user says yes, then the script should be executed and the conversion from feet to yard done. But the user says no, the program should stop and exit out.

I need some ideas.
This sounds like homework. If it is, you should make an effort to write the script. If you then need help, post what you have written, and ask a more detailed question concerning your problem.

If it isn't homework, you should still make the effort.
# 3  
Old 03-09-2007
Well, If you are not aware of this then you must read this link
# 4  
Old 03-09-2007
Statement

Actually, It is not a homework. I left school a long time ago Smilie. Anyways, I am just trying to develop some unix skills especially when it comes to scripting. I am writing simple programs on my own, but am asking for some help after many trials and I cannot get it to work.
If you think it is too easy for me to request the forum's input. I apologize for my ignorance.

I am guessing I need to use a maybe "if statement", but I am not sure. I have tried (if,then,elseif,fi) to no avail. I get many error messages.
# 5  
Old 03-09-2007
I am looking to write a statement that allow me to contimue when the user enters Yes and exit the program if the user enters no. Let me know whta you guys think. what is wrong with my if statement?




cat conversion
#! /usr/bin/ksh
echo "This program is designed to do measurement conversion"
echo "Enter yard"
read yard
echo "The result in feet is:"
expr $yard '*' 3
echo "Do you want to convert from feet to yard as well?"
echo "Please enter your answer"
echo "please enter yes to continue or no to exit:"
read
if
($answer = yes) &&

echo "You have entered yes:"
then
echo "please enter feet"
read feet
echo "The result in yard is:"
expr $feet / 3
else
clear
fi
# 6  
Old 03-09-2007
What you need is a while loop. I'd write it so that it is an infinite loop, with a break statement to exit the loop when the user is done. Here is the basic form:

Code:
while true
do
  # your main routine goes here

  printf "%s " "Another conversion?"
  read continue
  case $continue in
    [yY]*) ;;
    *) printf "%s\n" "Good-bye"
        break
        ;;
  esac
done


Last edited by cfajohnson; 03-09-2007 at 02:07 PM.. Reason: To trim the quoting
# 7  
Old 03-09-2007
statement

I am still having the same issue. Whether I enter yes or no, the program prompts me to enter feet without exiting. I want the program to exit when the user enters no. What is still missing?

#! /usr/bin/ksh
echo "This program is designed to do measurement conversion"
echo "Enter yard"
read yard
echo "The result in feet is:"
expr $yard '*' 3
echo "Do you want to convert from feet to yard as well?"
echo "Please enter your answer"
echo "please enter yes to continue or no to exit:"
read
while true
do
printf "%s " " Enter feet?"
read feet
echo "The result in yard is:"
expr $feet / 3
read continue
case $continue in
[yy]*) ;;
*) printf "%s\n" "Good-bye"
break
;;
esac
done


"OUTPUT"
This program is designed to do measurement conversion
Enter yard
125468
The result in feet is:
376404
Do you want to convert from feet to yard as well?
Please enter your answer
please enter yes to continue or no to exit:
no
Enter feet?
The result in yard is:

Previous Thread | Next Thread
Test Your Knowledge in Computers #672
Difficulty: Medium
The 802.11ad/ay, also known as WiGig operates in 60 GHz ISM band.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Convert Update statement into Insert statement in UNIX using awk, sed....

Hi folks, I have a scenario to convert the update statements into insert statements using shell script (awk, sed...) or in database using regex. I have a bunch of update statements with all columns in a file which I need to convert into insert statements. UPDATE TABLE_A SET COL1=1 WHERE... (0 Replies)
Discussion started by: dev123
0 Replies

2. Shell Programming and Scripting

If statement

Hi, I have this code here. Its suppose to do something when certain condition is met, I'm pretty sure at least one of the condition will be meet somewhere in the loop but it always go to else part of the script. Is something wrong on this script? age_list=`tar -tvf /home/dir/$tarfile... (4 Replies)
Discussion started by: erin00
4 Replies

3. Shell Programming and Scripting

Statement

${PFILE}.backupfile Please tell me what the above statement means? (1 Reply)
Discussion started by: lg123
1 Replies

4. Shell Programming and Scripting

Statement

${GREP} ASM /var/opt/oracle/oratab | \ ${CUT} -d':' -f1 Please tell me the meaning for the above statement. (2 Replies)
Discussion started by: lg123
2 Replies

5. Shell Programming and Scripting

If statement help

I'm trying to create a script that would allow me to identify the sucessful removal of a file. Here's what i put together so far, let me know if it's correct or not. FILE_NAME="cactus.dat" FILE_FIND='find / -name $FILE_NAME' if ;then echo "cactus.dat was not removed successfully" ... (3 Replies)
Discussion started by: sdpinoy
3 Replies

6. UNIX for Dummies Questions & Answers

If statement (yes or no)

I have the program: #!/bin/ksh echo Please enter yes or no read n typeset -l n if ] then echo My name exit else echo delete my name fi Question: How can I make the program accept only the word "yes" or "no" otherwise it will ask the user to re-enter? Thanks! (7 Replies)
Discussion started by: bobo
7 Replies

7. Shell Programming and Scripting

How is use sselect statement o/p in insert statement.

Hi All, I am using Unix ksh script. I need to insert values to a table using the o/p from a slelect statement. Can anybody Help! My script looks like tihs. ---`sqlplus -s username/password@SID << EOF set heading off set feedback off set pages 0 insert into ${TB_NAME}_D... (2 Replies)
Discussion started by: nkosaraju
2 Replies

8. Shell Programming and Scripting

If statement - How to write a null statement

In my ksh script, if the conditions of a if statement are true, then do nothing; otherwise, execute some commands. How do I write the "do nothing" statement in the following example? Example: if (( "$x"="1" && "$y"="a" && "$z"="happy" )) then do nothing else command command fi... (3 Replies)
Discussion started by: april
3 Replies

9. Shell Programming and Scripting

if statement

can someone please tell me what is wrong with the below. i'm trying to get a script to run if the content of a variable is either small letter y or capital letter Y. if then whatever fi (4 Replies)
Discussion started by: Terrible
4 Replies

10. Shell Programming and Scripting

If statement

Hi, I have a statement in shell script which i am writing below: if ] then ..... What is the meaning of -a option in files, meaning of the statement in the if condition ] means. Thanks (3 Replies)
Discussion started by: dreams5617
3 Replies

Featured Tech Videos