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Top Forums Shell Programming and Scripting Simple maths calculator loop. Post 302583043 by johnthebaptist on Monday 19th of December 2011 11:17:11 AM
Old 12-19-2011
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 equation.
5. The script should loop back if the user chooses to add another operation, and ask for another number (repeat until result)

Now, i already have the arithmetic sorted, and i know i have to add an UNTIL loop, but i'm not very good with loops as i find them hard to understand.

Here is a copy of my code so far:

-----
Code:
echo "please enter a number"
read n1

echo "please choose an operation"
echo "1. add"
echo "2. subtract"
echo "3. divide"
echo "4. multiply"
read opr

echo "please enter a number again"
read n2

if [ $opr = "1" ]
   then
      echo $((n1+n2))
elif [ $opr = "2" ]
   then  
      echo $((n1-n2))
elif [ $opr = "3" ]
   then
      echo $((n1/n2))
elif [ $opr = "4" ]
   then
       echo $((n1*n2))

fi
exit 0

-----

Can anyone give me any pointers? I really have tried to look for solutions but this is my last hope. ANTHING WILL HELP. THanks

Moderator's Comments:
Mod Comment How to use code tags when posting data and code samples.

Last edited by Franklin52; 12-19-2011 at 12:56 PM.. Reason: Please use code tags for data and code samples, thank you
 

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Net::CLI::Interact::Manual::Phrasebook(3pm)		User Contributed Perl Documentation	       Net::CLI::Interact::Manual::Phrasebook(3pm)

NAME
Net::CLI::Interact::Manual::Phrasebook - List of Supported CLIs INTRODUCTION
The bundled phrasebook includes support for a variety of network device CLIs. Many were contributed by users of the module. If you set up a new CLI dictionary, please consider contributing it back! The phrasebook specification is given in Net::CLI::Interact::Phrasebook. For each supported CLI, there is a name which must be passed in the "personality" option to Net::CLI::Interact's "new()" method. After that, you can call the included Macros, and the module will use the included Prompt to match the current state of the CLI. More information is available in the Tutorial and Cookbook. Below is a list of all current bundled CLI dictionaries. Each lists its name, the available Prompts, Macros and Continuations, and from which other CLI dictionaries it inherits. IOS # Cisco IOS CatOS # for older, pre-IOS Cisco devices PIXOS # for PIX OS-based devices PIXOS7 # Slightly different commands from other PIXOS versions FWSM # currently the same as 'PIXOS' FWSM3 # for FWSM Release 3.x devices (slightly different to FWSM 2.x) JunOS # Juniper JUNOS support HP # HP support Nortel # Nortel support ExtremeOS # Extreme Networks support Foundry # Foundry/Brocade device support PERSONALITIES
Cisco This personality goes by the name of "cisco" and provides a basis for many other CLI dictionaries. Prompts are "basic", "privileged", "configure", "user", and "pass". Macros are "begin_privileged", "end_privileged", "begin_configure", "end_configure", and "disconnect". CatOS This personality goes by the name of "catos" and inherits from the "cisco" dictionary. Additionally it provides the "privileged" Prompt. Additionally it also provides the "paging" Macro to set the terminal page size. ExtremeOS This personality goes by the name of "extremeos" and inherits from the "cisco" dictionary. Additional Prompts are "basic", "privileged", "configure", "user", and "pass". Additional Macros are "begin_privileged", "end_privileged", and "disconnect". Foundry / Brocade This personality goes by the name of "foundry" and inherits from the "cisco" dictionary. Before connecting to the device you probably want to set the output separator to be: $nci->transport->ors(" "); For users of Net::Appliance::Session this should be: $session_obj->nci->transport->ors(" "); IOS This personality goes by the name of "ios" and inherits from the "cisco" dictionary. Additionally it provides the "paging" Macro to set the terminal page size. HP This personality goes by the name of "hp" and inherits from the "cisco" dictionary. Additionally it provides the "basic" and "user" Prompts. JunOS This personality goes by the name of "junos" and inherits from the "cisco" dictionary. Additionally it provides the "privileged", "configure", and "user" Prompts. Additionally it also provides the "begin_configure" and "paging" Macros. Nortel This personality goes by the name of "nortel" and inherits from the "cisco" dictionary. Additionally it provides the "user" Prompt. PIXOS This personality goes by the name of "pixos" and inherits from the "cisco" dictionary. Additionally it provides the "paging" Macro to set the terminal page size. It can be used in its own right for Cisco PIX firewalls, but is also used as a base for other dictionaries. PIXOS 7 This personality goes by the name of "pixos7" and inherits from the "pixos" dictionary. Additionally it provides the "paging" Macro to set the terminal page size. FWSM This personality goes by the name of "fwsm" and inherits from the "pixos" dictionary. It provides no further functionality, as Cisco FWSM software version 1 and 2 was the same as the PIX OS. FWSM 3 This personality goes by the name of "fwsm3" and inherits from the "pixos" dictionary. Additionally it provides the "paging" Macro to set the terminal page size. perl v5.14.2 2012-06-12 Net::CLI::Interact::Manual::Phrasebook(3pm)
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