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C++ Functions
course content

Course Content

C++ Functions

C++ Functions

1. Introduction
What is Function in C++?How to Create Function in C++?Simple Function CreationVariable ScopesUnderstanding Variable Scopes
2. Function Arguments Specification
Positional and Default ArgumentsPassing Arguments by Value/Pointer/ReferenceConstant Function ArgumentsPassing Static Array as an Argument of the FunctionPassing Dynamic Array as an Argument of the FunctionWhy Do We Need Array Size as an Argument?Passing Custom Structures as Arguments
3. Function Return Values Specification
Returning Values With Simple Data TypesReturning Arrays from the FunctionReturn Custom Data TypesVoid Return Type
4. Some Advanced Topics
Function OverloadingFunction Overloading PracticeRecursionLambda Functions

bookWhy Do We Need Array Size as an Argument?

Task

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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bookWhy Do We Need Array Size as an Argument?

Task

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 desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 2. Chapter 6
toggle bottom row

bookWhy Do We Need Array Size as an Argument?

Task

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 desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Task

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 desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 2. Chapter 6
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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