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< Erlang ~ Module(details) |
| shayan |
 Posted: Mon Jul 07, 2008 3:14 am |
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Joined: 06 Jul 2008
Posts: 2
Location: Göteborg,Sweden
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Yes sure.i just started to learn Module and i just wanted to play around with it.so i wanted to write some function as below and as it stated in the book(Programming Erlang) page 34 chapter3(Sequential programming):
-module(geometry).
-export([area/1]).
area({rectangle,Width,Ht}) -> Width * Ht;
area({circle,R}) -> 3.14159 * R * R.
but whenever i just write the first line:
-module(geometry).
i get this error message:
** exception error: undefined function shell_default:module/1
So that, i can't continue with the rest and that is all about it. |
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| michal |
| Posted: Mon Jul 07, 2008 1:19 pm |
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User
Joined: 20 Jul 2006
Posts: 44
Location: London
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You should save the source code of your module in a file geometry.erl and then compile it. On page 35 Joe explains how to compile your module. You cannot type the entire source of a module in Erlang shell, this is why you get error messages.
/Michal |
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