When a program invokes a library, it gains the behavior implemented inside that library without having to implement that behavior itself. The value of a library lies in the reuse of standardized program elements. The distinguishing feature is that a library is organized for the purposes of being reused by independent programs or sub-programs, and the user only needs to know the interface and not the internal details of the library. In that case, there may be internal libraries that are reused by independent sub-portions of the large program. This distinction can gain a hierarchical notion when a program grows large, such as a multi-million-line program.
#VIRTUAL WIRE LIBRARY COMMANDS CODE#
Library code is organized in such a way that it can be used by multiple programs that have no connection to each other, while code that is part of a program is organized to be used only within that one program. What distinguishes the call as being to a library function, versus being to another function in the same program, is the way that the code is organized in the system. For example, in a simple imperative language such as C, the behavior in a library is invoked by using C's normal function-call. A program invokes the library-provided behavior via a mechanism of the language. In addition, the behavior is provided for reuse by multiple independent programs. For instance, people who want to write a higher-level program can use a library to make system calls instead of implementing those system calls over and over again. Ī library is also a collection of implementations of behavior, written in terms of a language, that has a well-defined interface by which the behavior is invoked.
In IBM's OS/360 and its successors they are referred to as partitioned data sets. These may include configuration data, documentation, help data, message templates, pre-written code and subroutines, classes, values or type specifications.
#VIRTUAL WIRE LIBRARY COMMANDS SOFTWARE#
In computer science, a library is a collection of non-volatile resources used by computer programs, often for software development. Illustration of an application which uses libvorbisfile to play an Ogg Vorbis file
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