C questions

[Hazer]

C, C++, objective C, C--.
I know about different between c and c++ but i don't know about objective C and C--. Can anyone explain when use objective C and is C-- a programming language?
Thanks

[Zhuge]

C-- is a programming language, but isn't designed to be written by programmers.

See: http://en.wikipedia.org/wiki/C--

Objective-C is a reflective, object-oriented programming language which adds Smalltalk-style messaging to C.

See: http://en.wikipedia.org/wiki/Objective_c