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 just "call" for short) causes execution to be transferred temporarily from the current function to the one named in the call.

A called function is a function that starts execution as a result of a function call.

A calling function is a function that suspends execution as a result of a function call.

A return statement is the mechanism used by a called function to return to the calling function, which picks up just where it left off.

A console mode program is a program that looks like a DOS program rather than a Windows program.