© Ivor Horton and Peter Van Weert 2018
Ivor Horton and Peter Van WeertBeginning C++17https://doi.org/10.1007/978-1-4842-3366-5_8

8. Defining Functions

Ivor Horton1  and Peter Van Weert2
Stratford-upon-Avon, Warwickshire, UK
Kessel-Lo, Belgium

Segmenting a program into manageable chunks of code is fundamental to programming in every language. A function is a basic building block in C++ programs. So far, every example has had one function, main(), and has typically used functions from the Standard Library. This chapter is all about defining your own functions with names that you choose.

In this chapter, you will learn:
  • What a function is and why you should segment your programs into functions

  • How to declare and define functions

  • How data is passed ...

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