Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Simple Calculator
Homework and Emergencies Homework & Coursework Questions Simple Calculator Post 302784895 by balajesuri on Saturday 23rd of March 2013 12:05:51 PM
Old 03-23-2013
Quote:
Originally Posted by herb bertz
In the command line enter the script file
/home/etc/mycalc or /home/etc/mycalc 1 + 1 . My script file should identify if the data needed to do the calculating is present (mycalc 1 + 1)
or if it needs to ask for input (mycalc).
Play around with positional parameters if you want to do such exercises. Here's a sample program to get you started.

Code:
[user@host ~]$ cat test.sh
#! /bin/bash

if [ $# -ne 2 ] # $# here is a special shell variable which gives you the number of command line arguments supplied
then
    echo "Please supply exactly two arguments."
    exit
fi

first=$1
second=$2

echo "First argument is: $first"
echo "Second argument is: $second"
[user@host ~]$ ./test.sh hello world
First argument is: hello
Second argument is: world
[user@host ~]$ ./test.sh
Please supply exactly two arguments.
[user@host ~]$

Quote:
Originally Posted by herb bertz
Also can anyone tell me how to automaticly get line numbers put in the script so when an error comes up it is easy to find the line without counting the lines?
Open the program in vi vi test.sh. In the command mode (press ESC key, if you're unsure which mode you're currently in) and type :set nu. This will display the line numbers without affecting the program functionality. To remove the line numbers type this in command mode :set nonu. And I hope you're using vi for writing your scripts and not some GUI editor.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

calculator program..

Hey can anyone tell me the korn script code to implement an interactive integer calculator using the shell's built in arithemetic expression evaluation (2 Replies)
Discussion started by: sahithi_khushi
2 Replies

2. Shell Programming and Scripting

Calculator

I am pretty new to the Unix word, and have created a working calculator script. I have one problem. It doesn't use any decimals, it rounds off to the nearest whole number. 1 #!/bin/ksh 2 while true; do 3 echo -n "Enter the first integer: "; read IN1 4 test... (2 Replies)
Discussion started by: ironhead3fan
2 Replies

3. UNIX for Dummies Questions & Answers

calculator

hi, im new to the unix system and scripting and was wondering if anyone could help me with this problem iv been havin... i want the system to: 1. ask me for a number 2. ask me for a command to use on that number (* + - /) 3. ask me for another number 4. then ask me for another command, if the... (2 Replies)
Discussion started by: jdougy
2 Replies

4. Shell Programming and Scripting

Bash Calculator issue

Hello, I'm relatively new to using bc so I could use some help. In this script im working on I want to have the bc function to calculate float numbers for imagemagicks convert charcoal. Below is what I'm talking about. There are no syntax errors but when it outputs the users frames for example 0-10... (2 Replies)
Discussion started by: jsells20
2 Replies

5. Shell Programming and Scripting

Help with calculator code

Hi Guys, I found this code in net.. it is working fine.. But can anybody explain me the sed statement used in the code.. echo "Enter the expression:\c" read express eval echo "$express"|sed 's/^/'$precision' \ /'|bc -l|\ sed -n '1,${ /syntax/!{ } ... (2 Replies)
Discussion started by: mac4rfree
2 Replies

6. Homework & Coursework Questions

Problem with calculator script

I'm having some trouble implementing a basic calculator using command line options. The script is supposed to take (multiple) arguments -a,-d,-m,-s for addition, multiplication, division, and subtraction. I'm pretty sure I know how to parse through the options with getopt(), but I have no idea... (17 Replies)
Discussion started by: zkapopou
17 Replies

7. Shell Programming and Scripting

Simple maths calculator loop.

Hi, I am trying to make a maths calculator that: 1. Prompts the user for a number. 2. Prompts the user for an operation (add, subtract, divide or multiply) 3. Prompts the user for a number. 4. Prompts the user for another operation (same as above) OR the option to get the result for the... (4 Replies)
Discussion started by: johnthebaptist
4 Replies

8. Shell Programming and Scripting

Simple calculator with menu input - Need Help

I am trying to make a calculator. The user Enters number 1, chooses and operation, enters number 2, then chooses another operation or for the answer to be displayed. eg. 1 + 1 = or 1 + 1 + 2 + 1 = Both of these should be possible. #!/bin/bash read -p "what's the first number? " n1... (3 Replies)
Discussion started by: redshine6
3 Replies

9. Shell Programming and Scripting

CSH Calculator Script

Using the C Shell, I'm building a script that will compute simple mathematical computations (addition, subtraction, multiplication, division). The user will enter two integers (operands) on the command line separated by the operation (operator) they wish to perform. Example of the command line... (7 Replies)
Discussion started by: ksmarine1980
7 Replies

10. Shell Programming and Scripting

Simple Scientific calculator for ADE, the UNIX environment for the AMIGA A1200(HD).

ADE is a UNIX environment for the ancient AMIGA A1200. By default this does NOT have the 'bc' command line calculator. Although I did a DEMO code to create a C source and compile it under python 1.4.0 and ADE using ksh88 and the gcc of the day, I decided to create this baby that requires no Python... (2 Replies)
Discussion started by: wisecracker
2 Replies

LEARN ABOUT CENTOS

drop_text_search_template

DROP TEXT SEARCH 
TEMPLATE(7)				  PostgreSQL 9.2.7 Documentation			      DROP TEXT SEARCH TEMPLATE(7)

NAME

       DROP_TEXT_SEARCH_TEMPLATE - remove a text search template

SYNOPSIS

       DROP TEXT SEARCH TEMPLATE [ IF EXISTS ] name [ CASCADE | RESTRICT ]

DESCRIPTION

       DROP TEXT SEARCH TEMPLATE drops an existing text search template. You must be a superuser to use this command.

PARAMETERS

       IF EXISTS
	   Do not throw an error if the text search template does not exist. A notice is issued in this case.

       name
	   The name (optionally schema-qualified) of an existing text search template.

       CASCADE
	   Automatically drop objects that depend on the text search template.

       RESTRICT
	   Refuse to drop the text search template if any objects depend on it. This is the default.

EXAMPLES

       Remove the text search template thesaurus:

	   DROP TEXT SEARCH TEMPLATE thesaurus;

       This command will not succeed if there are any existing text search dictionaries that use the template. Add CASCADE to drop such
       dictionaries along with the template.

COMPATIBILITY

       There is no DROP TEXT SEARCH TEMPLATE statement in the SQL standard.

SEE ALSO

       ALTER TEXT SEARCH TEMPLATE (ALTER_TEXT_SEARCH_TEMPLATE(7)), CREATE TEXT SEARCH TEMPLATE (CREATE_TEXT_SEARCH_TEMPLATE(7))

PostgreSQL 9.2.7						    2014-02-17					      DROP TEXT SEARCH TEMPLATE(7)
All times are GMT -4. The time now is 08:45 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy