?C++

C with classes, templates and the STL - the favourite of competitive programmers and game engines alike.

??Theory & Lessons ??Code Examples ??Codeforces Practice

4 Phases · 16Topics · Basic → Advanced

1

Phase 1

C++ Basics

4 topics

Introduction to C++

What C++ is, why competitive programmers love it, installing g++, and your first Hello World.

Variables, auto & References

Built-in types, auto type deduction, const, and the reference (&) — C++'s safer pointer.

I/O with cin & cout

Stream I/O, getline, manipulators (setw, fixed, setprecision), and fast I/O for CP.

Control Flow & Range-for

if / else if / switch, while, for, and the modern range-based for loop.

2

Phase 2

Functions, Strings & vector

4 topics

Functions, Overloading & Lambdas

Function overloading, default arguments, pass-by-reference, and short lambda functions.

std::string

string vs C-strings, concatenation, substr, find, and string algorithms.

std::vector

The dynamic array — push_back, size, indexing, iteration, and complexity.

Classes & Structs

class vs struct, constructors, destructors, member functions, access specifiers.

3

Phase 3

OOP, Memory & STL

4 topics

Inheritance & Polymorphism

Base/derived classes, virtual functions, abstract classes, and the override keyword.

new, delete & Smart Pointers

Heap memory, RAII, unique_ptr, shared_ptr, weak_ptr — the modern way.

Templates & Generic Code

Function templates, class templates, type deduction, and template specialisation.

STL Containers

map, set, unordered_map, list, deque, stack, queue, priority_queue — when to use each.

4

Phase 4

Modern C++ & Algorithms

4 topics

STL Algorithms & Lambdas

sort, find, accumulate, transform, count_if — power tools used with lambda functions.

Iterators

begin/end, iterator categories, range-based for, and a peek at C++20 ranges.

Modern C++ (11/14/17/20)

auto, structured bindings, move semantics, constexpr, optional, variant.

Practice & Projects

Curated problems on Codeforces, LeetCode, AtCoder, and project ideas to build.