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hi,
In article <1992Dec18.183133.6855@ennews.eas.asu.edu>,
raothall@iienext1.cim.eas.asu.edu (Karthic V. Rao-Thallikar) says:
>

I ran into the same problem with compiling the same program on the NeXT
platform.  My advisor solved the problem by:first including the header files of
the classes istead of .m files, then, compiling the .m files all together.

cc -ObjC Integer.m Float.m Fraction.m theMain.m
rm
>To all Objective-C Guru's:
>I am starting to write code in ObjecC. I am familiar with 'C'.
>My understanding of OOP is that if there are two similar classes eg
>Integer and Float the user can have the facility of using similarly named
>instance methods to operate on these classes. Just to try this out i coded
>the following lines. But the compiler reports errors for the 'initialize'
>and 'incrementBy' methods, and used the method defined for the Integer
>Class.
>Please do reply the correct procedure.
>I am using NeXt 3.0, and NeXt's ObjectiveC version that comes with the 3.0
>version.
>Thank you all in advance.
>Following is the code.
>They are in different file but I have 'cat' them for convinience.
>The error from the compiler is appended at the end for reference.
>
>//Test program  for late bindind
>#import "Integer.m"
>#import "Float.m"

Here, import the header files: Integer.h, Float.h and Fraction.h

>#import "Fraction.m"
>#import <stdio.h>
>
>errors are:

>> cc test.m

you have to use -ObjC option when you compile Objective C code in the NeXT
platform, as far as I know.  Use the following command:

    cc -ObjC Integer.m Float.m Fraction.m test.m -o test

>Float.m: In method `new:'
>In file included from test.m:4:
>Float.m:8: warning: multiple declarations for method `initialize:'
>Integer.h:11: using `-initialize:(int)anInt'
>Float.h:10: also found `-initialize:(float)aValue'
>Float.m: In method `incrementBy:'
>Float.m:20: conflicting types for `-incrementBy:(float)aValue'
>Float.h:12: previous declaration of `-incrementBy:(int)aValue'
>test.m: In function `main':
>test.m:46: warning: multiple declarations for method `incrementBy:'
>Integer.h:13: using `-incrementBy:(int)aValue'
>Float.m:20: also found `-incrementBy:(float)aValue'
>>
The above two changes should fix the problem.  I like PINSON/WIENER'S book
a lot despite the fact that I could not work some of their code on
the machine that I use. It is a NeXT, too.

Have fun.