![]() ![]() Unfortunately there were some small, subtle differences between the interpreter and the compiler, so that sometimes programs running perfectly well in the interpreter would fail after compilation, or even not compile at all. The editor also had an interpreter built in which would run the program without leaving the editor at all, and could be used to debug the program before creating an executable file. Microsoft's "PC BASIC Compiler" was included which could be used to compile programs into DOS executables. Line numbers were no longer needed since users could insert and remove lines directly via an onscreen text editor. QuickBASIC came with a markedly different Integrated Design Environment (IDE) from the one supplied with previous versions of BASIC. Microsoft released the first version of QuickBASIC on Augstored on a single 5.25" floppy disk. Microsoft sold QuickBASIC as a commercial development suite. ![]() It was loosely based on GW-BASIC but in addition provided user-defined types, improved programming structures, better graphics and disk support and a compiler in addition to the interpreter. Microsoft QuickBASIC (often shortened, correctly, to QB, or incorrectly, to "QBasic", which is a different system) is a descendant of the BASIC programming language that was developed by the Microsoft Corporation for use with the MS-DOS Operating System. ![]() QuickBASIC is a twenty year old interpreter/compiler upon which FreeBASIC is modeled. ![]()
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