There is no C+.
Objective-C is a reflective, object-oriented programming language, which adds Smalltalk-style messaging to the C programming language.
C is a general-purpose computer programming language developed in 1972 by Dennis Ritchie at the Bell Telephone Laboratories for use with the Unix operating system.
C++ is a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language.
Ada is a programming language. Suitable for all development needs, it has built-in features that directly support structured, object-oriented, generic, distributed and concurrent programming.