Exploring C++20: The Programmer's Introduction to C++

© Ray Lischner 2020

R. LischnerExploring C++20https://doi.org/10.1007/978-1-4842-5961-0_21

21. Function Arguments

Ray Lischner¹ 

(1)

Ellicott City, MD, USA

 

This Exploration continues the examination of functions introduced in Exploration 20, by focusing on argument passing. Take a closer look. Remember that arguments are the expressions that you pass to a function in a function call. Parameters are the variables that you declare in the function declaration. This Exploration introduces the topic of function arguments, an area of C++ that is surprisingly complex and subtle.

Argument Passing

Read through Listing 21-1, then answer the questions that follow it.

import <algorithm>;

import <iostream>;

import <iterator>;

import <vector>;

void modify(int x)

{

  x = ...