C++ Code Examples

Welcome to Your C++ Learning Hub

Take a walk through the diverse world of C++ programming with our vast set of code examples. This repository is designed both for novices willing to crack the basics and for those more advanced programmers who would like to develop themselves in this mighty programming language.

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C++ Introduction

Differences between C++98, C++11, C++14, C++17, and C++20?
How does C++ manage memory, and what are the common pitfalls related to memory management?
What are Lambda Expressions in C++?
What are the advantages and disadvantages of using templates in C++?
What is RAII (Resource Acquisition Is Initialization) and how does it benefit C++ programming?

C++ Basics

Arithmetic operators
Basic code examples
Bitoperators
C++ Basics Cheat Sheet
C++ Code Example: check password strength
C++ Code Example: convert celsius to fahrenheit
C++ Code Example: convert decimal to binary number
C++ Code Example: convert decimal to hexadecimal number
C++ Code Example: convert decimal to octal number
C++ Code Example: Convert different data types to int
C++ Programming Language Introduction
Comments in C++
Conversion Programs
Data types in C++
Datatype string
Declaration and initialization
Escape sequences – special characters
Hello world
Input / output
Operators in C++
Range of values and memory size of all data types
Read out memory of Data Type
Relational and logical operators
Ternary operator
Understanding Namespaces in C++

Control Structures in C++

C++ Code Example: Advanced switch-case Statement
C++ Code Example: Categorizing a Person Based on Age and Other Conditions
C++ Code Example: check if a number is positive or negative
C++ Code Example: Check Leap Year in if-else Statement
C++ Code Example: Christmas Tree Pattern
C++ Code Example: Display Characters from A to Z using for loop
C++ Code Example: Double Nested for loop
C++ Code Example: Floyd’s Triangle
C++ Code Example: for-loop through an array to output the content
C++ Code Example: Get Weekday
C++ Code Example: Hourglass Pattern
C++ Code Example: if-else Statement on Boolean Expressions
C++ Code Example: Left Arrow Pattern
C++ Code Example: multi-branches
C++ Code Example: Nested for loop
C++ Code Example: nested if-else statement
C++ Code Example: Pattern Reverse
C++ Code Example: Right Arrow Pattern
C++ Code Example: Simple Calculator
C++ Code Example: simple if-else statement
C++ Code Example: Simple Pattern
C++ Code Example: Triangle Pattern
C++ Code Example: while-loop through an array to output the content
for Loop
If-else Statement
Introduction to Control Structures in C++
Switch-case Statement
while Loop

Functions in C++

C++ Code Example: calculate cross sum (iterative and recursive)
C++ Code Example: greatest common divisor (recursion)
C++ Code Example: least common multiple
C++ Code Example: passing array to function
C++ Code Example: simple login
C++ Code Example: tower of hanoi (recursive)
C++ Code Example: volume and surface area of a ball
C++ Code Example: volume and surface of a cube
C++ Functions: Introduction
Definition and declaration
Function parameters
Functions in Namespaces
Inline functions
Passing objects to functions
Recursion
Static functions
Synchronous vs. Asynchronous Functions

Arrays in C++

Accessing Array Elements
Array methods
Array of Pointers
Array Size Determination
Array syntax
Arrays and std::array
Arrays of Structures or Classes
at() – get element by index
C++ Code Example 1: multidimensional array
C++ Code Example 2: multidimensional array
C++ Code Example: Array in Reverse Order
C++ Code Example: Average of Array
C++ Code Example: Even Numbers in Array
C++ Code Example: Join two Arrays
C++ Code Example: Largest Number in Array
C++ Code Example: Odd Numbers in Array
C++ Code Example: Print Array Elements
C++ Code Example: Prints out Indices of all Pairs of Numbers
C++ Code Example: Searchs an Array for a Number
C++ Code Example: Smallest Number in Array
C++ Code Example: Sum up all Numbers from Array
Const Arrays
fill() – fill array
font(), back() – first and last element in array
Handling Out-of-Bounds Access
Introduction to Arrays in C++
Multidimensional Arrays
Passing Arrays to Functions
Passing Multi-Dimensional Arrays as Function Arguments
Returning Arrays from Functions
size() – size of array
swap() – swap array elements

Object-Oriented Programming in C++

Abstraction
Aggregation
C++ Code Example: area of ​​a rectangle
C++ Code Example: data abstraction – public, private, protected
C++ Code Example: unique item number generation
C++ Code Example: volume of a cube
Classes and Objects
Composition
Constructor
Destructor
Friend Functions and Classes
Interfaces in C++ (Abstract Base Classes)
Introduction to Object-Oriented Programming in C++
Move Semantics
Run-Time Type Information (RTTI)
Static Members
Understanding Encapsulation

Inheritance and Polymorphism in C++

C++ Code Example: compile-time polymorphism (function overloading)
C++ Code Example: compile-time polymorphism (operator overloading)
C++ Code Example: single inheritance
Compile-time polymorphism
Definition of Polymorphism in C++
Function Overloading in C++
Hierarchical inheritance
Hybrid inheritance
Inheritance access control
Inheritance basics
Introduction to Inheritance and Polymorphism
Multilevel inheritance
Multiple inheritance
Operator Overloading
Run-Time Polymorphism
Single inheritance
Virtual Functions

Fileoperations in C++

C++ Fileoperations: check if two files have the same content
C++ Fileoperations: copy the file name and content of 10 files in another
C++ Fileoperations: read the file size and type of an image
Input / Output with files
Introduction to Fileoperations in C++
Read and write (fstream)
Read from file (ifstream)
Text files
Write to file (ofstream)

Data Structures in C++

Binary search tree
Introduction to Data Structures in Java
Linked list data structure
Queue data structure
Singly Linked List Code Example 1
Singly Linked List Code Example 2
Singly Linked List Code Example 3
Stack data structure

Sorting Algorithms in C++

Bubble sort algorithm
Heap sort algorithm
Insertion sort algorithm
Merge sort algorithm
Quicksort algorithm
Selection sort algorithm
Shellsort algorithm
Tim sort algorithm

Errors and Exception Handling in C++

C++ Standard Exceptions
Catching by Reference vs. Value
Catching multiple Exceptions
Custom Exception Messages
Example: std::range_error Exception
Example: Throw new Exception
Example: try-catch (division by zero)
Introduction to Errors and Exception Handling in C++
The noexcept Specifier
The std::terminate and std::unexpected Functions
Throw new Exceptions (throw-keyword)
Try-catch
User-Defined Exceptions
Using std::bad_alloc for Memory Allocation Failures

Mathematical Functions in C++

Arithmetic sequence
C++ cmath module
Exponential and logarithmic math functions
Fibonacci sequence
Geometric number sequence
Hyperbolic functions
Incremental sequence
Mathematical rounding
Prime numbers
Square number sequence
Triangular number sequence
Trigonometric math functions
Understanding the C++ cmath Module

Pointers in C++

Address operator (&)
Constant Pointers and Targets
Deference operator (*)
Example 1: deference operator
Example 2: deference and address operator
Example 3: pointers in for-loop
Example 4: pointers and functions
Example 5: pass function arguments as pointers
Example 6: pass function arguments by reference
Function pointer
Null pointer
Pointer and Classes
Pointers and arrays
Void pointer

Templates in C++

(CRTP) Curiously Recurring Template Pattern
C++ Code Example 1: function templates – swap two numbers
C++ Code Example 2: function templates – copy array in reverse order
C++ Code Example 3: function templates – determine min and max value
C++ Code Example 4: simple function template example
C++ Code Example 5: advanced function template example
C++ Code Example 5: class template example
C++ Code Example 6: LinkedList class template example
Class templates
Dependent Names and the typename Keyword
Function templates
Introduction to Templates in C++
Real-World Examples of Using Templates in C++
SFINAE (Substitution Failure Is Not An Error)
Template Argument Deduction
Template Constraints and Concepts in C++20
Template Metaprogramming (TMP)
Template Parameters
Type Traits (std::is_integral, std::is_same, etc.)
Variadic Templates

System Functions in C++

Create new directory
Get system date
List files and sub-directories
Running a Python Script with Arguments Using std::system
Shutdown / restart computer
Understanding the system() Function in C++