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Function Declarations

Explore how to properly declare functions in C++ to enable their use before definition. Understand forward declarations, function return types, parameters, and coding conventions to write clearer, well-structured programs.

Declaration of a function in C++

Before we discuss calling functions, we must discuss declarations. Programs written in C++ are executed in logical order from the top down. A statement can only use symbols, or named constructs like functions, that are declared in code that has already been executed. Simply put, the compiler must be aware of the name used to describe a function before that function can be called in the code. ...