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GeezerVison is showing en.wikipedia.org — FreeBASIC - Wikipedia Not to be confused with Free Basics.
FreeBASIC is a free and open-source multiplatform compiler and programming language based on BASIC licensed under the GNU GPL for Microsoft Windows, protected-mode MS-DOS (DOS extender), Linux, FreeBSD, and Xbox. (The Xbox version is no longer maintained.)[2] According to its official website,[3] FreeBASIC provides syntax compatibility with programs originally written in Microsoft QuickBASIC (QB). Unlike QuickBASIC, however, FreeBASIC is a command line only compiler, unless users manually install an external integrated development environment (IDE) of their choice.[4] Compiler featuresOn its back end, FreeBASIC makes use of GNU Binutils in order to produce console and graphical user interface applications. FreeBASIC supports the linking and creation of C static and dynamic libraries and has limited support for C++ libraries. As a result, code compiled in FreeBASIC can be reused in most native development environments. While not an optimizing compiler, FreeBASIC can optionally transcompile to C to compile with optimizations. FreeBASIC supports inline assembly, multithreading, and does not use automatic garbage collection. C style preprocessing, including multiline macros, conditional compiling, and file inclusion, is supported. The preprocessor also has access to symbol information and compiler settings, such as the language dialect. SyntaxInitially, FreeBASIC emulated Microsoft QuickBASIC syntax as closely as possible. Beyond that, the language has continued its evolution. As a result, FreeBASIC combines several language dialects for maximum level of compatibility with QuickBASIC and full access to modern features.[5] New features include support for concepts such as objects, operator overloading, function overloading, namespaces, and others.[6] Newline characters indicate the termination of programming statements. A programming statement can be distributed on multiple consecutive lines by using the underscore line continuation char (_), whereas multiple statements may be written on a single line by separating each statement with a colon (:). Block comments and end-of-line remarks are supported. Full line comments are made with an apostrophe FreeBASIC is not case-sensitive. Graphics libraryFreeBASIC provides built-in, QuickBASIC compatible graphics support through FBgfx, which is automatically included into programs that make a call to the Users familiar with external graphics utilities such as OpenGL or the Windows API can use them without interfering with the built-in graphics library. Language dialectsAs FreeBASIC has evolved, changes have been made that required breaking older-styled syntax. In order to continue supporting programs written using the older syntax, FreeBASIC now supports the following dialects:
Example codeStandard programs, such as the "Hello, World!" program are done just as they were in QuickBASIC. Print "Hello, World!" sleep:end 'Comment, prevents the program window from closing instantly FreeBASIC adds to this with support for object-oriented features such as methods, constructors, dynamic memory allocation, properties, and temporary allocation. Type Vector Private: x As Integer y As Integer Public: Declare Constructor (nX As Integer = 0, nY As Integer = 0) Declare Property getX As Integer Declare Property getY As Integer End Type Constructor Vector (nX As Integer, nY As Integer) x = nX y = nY End Constructor Property Vector.getX As Integer Return x End Property Property Vector.getY As Integer Return y End Property Dim As Vector Ptr player = New Vector() *player = Type<Vector>(100, 100) Print player->getX Print player->getY Delete player Sleep 'Prevents the program window from closing instantly In both cases, the language is well suited for learning purposes. References
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