C++ Functions

C++ Functions

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1. Introduction

Now it's time to dive into the world of C++ functions! Now you will learn some general concepts about functions in C++, including their definition, declaration, and usage. Discover how to declare and call functions, and gain insights into variable scopes, both local and global, for effective program design.

What is Function in C++?

How to Create Function in C++?

Simple Function Creation

Variable Scopes

Understanding Variable Scopes

2. Function Arguments Specification

We will delve into specifying and using function arguments in C++ programming. Explore concepts like pass-by-value and pass-by-reference, and understand the role of default arguments; learn how to pass arrays as function arguments and become familiar with constant function arguments.

Positional and Default Arguments

Passing Arguments by Value/Pointer/Reference

Constant Function Arguments

Passing Static Array as an Argument of the Function

Passing Dynamic Array as an Argument of the Function

Why Do We Need Array Size as an Argument?

Passing Custom Structures as Arguments

3. Function Return Values Specification

Now we will learn about how to specify the return value of a function in C++. This includes understanding the data types that functions can return, such as integers, floating-point numbers, and arrays. We will also consider function that have no return value.

Returning Values With Simple Data Types

Returning Arrays from the Function

Return Custom Data Types

Void Return Type

4. Some Advanced Topics

Now let's delve into some additional topic in C++! We will explore function overloading, mastering the art of creating multiple functions with the same name but different parameter lists for enhanced code flexibility. Recursion is introduced, teaching the principles of recursive functions, allowing students to solve complex problems efficiently. Additionally, the section covers lambda functions, providing insights into creating concise anonymous functions/

Function Overloading

Function Overloading Practice

Lambda Functions

Course Content

C++ Functions

Why Do We Need Array Size as an Argument?

Task

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Why is it necessary to provide the size of the array as an additional argument when using dynamic arrays? The crucial factor is that technically, we are passing not the entire array but the pointer to its first value.

Remember

The compiler does not have information about the size of the array, which can lead to accessing memory beyond the array's boundaries, resulting in unexpected garbage values.

Let's solve a simple task to illustrate it:

Pass the dynamic array as the first argument of the function.
Call the function inside the main() block and pass the pointer at the first element of the array as the first argument.

Look at the result! Pay attention to the last two values!

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Everything was clear?

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Section 2. Chapter 6

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Why Do We Need Array Size as an Argument?

Task

Swipe to show code editor

Why is it necessary to provide the size of the array as an additional argument when using dynamic arrays? The crucial factor is that technically, we are passing not the entire array but the pointer to its first value.

Remember

The compiler does not have information about the size of the array, which can lead to accessing memory beyond the array's boundaries, resulting in unexpected garbage values.

Let's solve a simple task to illustrate it:

Pass the dynamic array as the first argument of the function.
Call the function inside the main() block and pass the pointer at the first element of the array as the first argument.

Look at the result! Pay attention to the last two values!

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 6

Switch to desktop for real-world practiceContinue from where you are using one of the options below

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