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Closed 10 years ago.

I reserved 2 library books which came on the same day. I saw them on the shelf and realized that they were the same except one was about ObjC and one was about ObjC 2.0.

Also, what is the Objective-C++?

Answer 1

Apple has an overview of Objective-C 2.0 on its Web site, though it s worth noting that the version of Objective-C 2 on the iPhone doesn t include garbage collection. Basically, the differences amount to:

Garbage collection (on the Mac)
for (id object in collection)
Properties and dot-syntax
Changes to the low-level runtime functions

Objective-C++ is a compiler mode that allows you to intermingle C++ code with Objective-C code in the same function body.

Answer 2

A little wiki told me:

Objective-C: a C-style programming language with Smalltalk-style messaging.
Objective-C++: a GCC front-end which adds to C++ the extensions Objective-C adds to C.
Objective-C 2.0: a revision of the Objective-C language that includes modern garbage collection, syntax enhancements, runtime performance improvements and 64-bit support. Also adds features such as properties and fast enumerators. Currently only for OSX.

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