Definitions
An implementation file is a file that contains source code for a program. Almost every part of every program starts out as an implementation file.
Compilation of an implementation file produces a file called an object code module (or object file), which contains object (machine) code.
Several object code modules of a generally useful nature can be combined to make a file called a library module, usually abbreviated to library.
A function is a section of code somewhat like a block, but with somewhat different characteristics. For one thing, you can't substitute a function for a statement; also, a function has a name, whereas blocks are anonymous. This name enables one function to start execution of another one.
A function call (or ...
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