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- Path: sparky!uunet!cis.ohio-state.edu!pacific.mps.ohio-state.edu!ohstpy!miavx1!miamiu!toznal
- Newsgroups: comp.lang.objective-c
- Subject: Re: problem with similar instance method names
- Message-ID: <92356.154409TOZNAL@MIAMIU.BITNET>
- From: tuncay <TOZNAL@MIAMIU.BITNET>
- Date: Monday, 21 Dec 1992 15:44:09 EST
- References: <1992Dec18.183133.6855@ennews.eas.asu.edu>
- Distribution: comp.lang.objective-c
- Organization: Miami University - Academic Computer Service
- Lines: 63
-
- 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.
-