C Program
A macro processor that is used automatically by the GNU C compiler
to transform programs before actual compilation.
This package has been separated from gcc for the benefit of those who
require the preprocessor but not the compiler.
C++ Program
C++ is an "object oriented" programming language created by Bjarne Stroustrup and released in 1985. It implements "data abstraction" using a concept called "classes", along with other features to allow object-oriented programming. Parts of the C++ program are easily reusable and extensible; existing code is easily modifiable without actually having to change the code. C++ adds a concept called "operator overloading" not seen in the earlier OOP languages and it makes the creation of libraries much cleaner.
C++ maintains aspects of the C programming language, yet has features which simplify memory management. Additionally, some of the features of C++ allow low-level access to memory but also contain high level features.
C++ could be considered a superset of C. C programs will run in C++ compilers. C uses structured programming concepts and techniques while C++ uses object oriented programming and classes which focus on data. Read about the History of C and also about the History of C++.
What is Perl?
Perl is a programming language which can be used for a large variety of tasks. A typical simple use of Perl would be for extracting information from a text file and printing out a report or for converting a text file into another form. But Perl provides a large number of tools for quite complicated problems, including systems programming.Programs written in Perl are called Perl scripts, whereas the term the perl program refers to the system program named perl for executing Perl scripts. (What, confused already?)
If you have used shell scripts or awk or sed or similar (Unix) utilities for various purposes, you will find that you can normally use Perl for those and many other purposes, and the code tends to be more compact. And if you haven't used such utilities but have started thinking you might have need for them, then perhaps what you really need to learn is Perl instead of all kinds of futilities.
Perl is implemented as an interpreted (not compiled) language. Thus, the execution of a Perl script tends to use more CPU time than a corresponding C program, for instance. On the other hand, computers tend to get faster and faster, and writing something in Perl instead of C tends to save your time.
TCL Beginner: Yes - OOP: No Examples: Scripting, sysadmin, applications Comments: PHP Beginner: Yes - OOP: Yes Examples: Www Comments: Popular for web databases Java Beginner: Yes - OOP: Yes Examples: Cross-platform applications, www Comments: Spreading to new areas, eg. e-commerce infrastructure Lisp Beginner: Yes - OOP: Functional Examples: Emacs modes (for Elisp), AI Comments: Variants Elisp, Clisp and Scheme Fortran Beginner: No - OOP: No Examples: Mathematical (scientific) applications Comments: Variants f77 and f90/95 C Beginner: No - OOP: No Examples: System programming, applications Comments: C++ Beginner: No - OOP: Yes Examples: Applications Comments:
