C++

A general-purpose programming language with imperative, object-oriented and generic programming features.

Introduction

Name	Preview	Code	Difficulty
Say “Hello, World!” With C++	Practice printing to stdout.	C++	Easy
Input and Output	Learn to take in the input and print the output. Take three number as input and print their sum as output.	C++	Easy
Basic Data Types	Learn about the basic data types in C++. Take the given input and print them.	C++	Easy
Conditional Statements	Practice using chained conditional statements.	C++	Easy
For Loop	Learn how to use for loop and print the output as per the given conditions	C++	Easy
Functions	Learn how to write functions in C++. Create a function to find the maximum of the four numbers.	C++	Easy
Pointer	Learn how to declare pointers and use them.	C++	Easy
Arrays Introduction	How to access and use arrays. Print the array in the reverse order.	C++	Easy
Variable Sized Arrays	Find the element described in the query for integer sequences.	C++	Easy

Strings

Name	Preview	Code	Difficulty
Strings	Learn how to input and output strings.	C++	Easy
StringStream	Learn how to use stringstreams.	C++	Easy
Attribute Parser	Parse the values within various tags.	C++	Medium

Classes

Name	Preview	Code	Difficulty
Structs	Learn how to create and use structures.	C++	Easy
Class	Learn how to create and use classes.	C++	Easy
Classes and Objects	Familiarize yourself with classes and objects.	C++	Easy
Box It!	Design a class named Box with overloaded operators.	C++	Easy
Inherited Code	Handle errors that can occur in the existing code.	C++	Medium
Exceptional Server	Handle server errors.	C++	Medium
Virtual Functions	Learn how to use virtual functions and solve the given problem.	C++	Medium
Abstract Classes - Polymorphism	Given an abstract class Cache, write a class LRUCache which extends the class Cache and implement an LRU cache.	C++	Hard

STL

Name	Preview	Code	Difficulty
Vector-Sort	Learn about the container vector. Sort a vector and print the sorted vector.	C++	Easy
Vector-Erase	Erasing an element from a vector.	C++	Easy
Lower Bound-STL	Given N numbers, you have to find the smallest integer greater than the given number and print the index of that number.	C++	Easy
Sets-STL	Learn about the set container. Given a problem with 3 queries, try to answer the queries using the set container.	C++	Easy
Maps-STL	Learn to use map container. Given some queries, add the marks to a corresponding student, delete a student and print the marks of a particular student.	C++	Easy
Print Pretty	This challenge will test your knowledge of the STL library.	C++	Easy
Deque-STL	Learn to use deque container. Find the maximum number in each and every contiguous sub array of size K in the given array.	C++	Medium

Inheritance

Name	Preview	Code	Difficulty
Inheritance Introduction	Learn how to inherit classes from other classes.	C++	Easy
Rectangle Area	Find out the area of a rectangle. You are given the objects to the class and you have to implement these classes.	C++	Easy
Multi Level Inheritance	Learn what multiple inheritance is and try to solve this problem.	C++	Easy
Accessing Inherited Functions	Access inherited functions with the same name.	C++	Medium
Magic Spells	Identify the correct kind of spell and possibly compare it with your spell journal.	C++	Hard

Debugging

Name	Preview	Code	Difficulty
Hotel Prices	Debug the existing class definitions so the total hotel’s profit is calculated correctly.	C++	Medium
Cpp exception handling	Handle possible exceptions in a correct way.	C++	Medium
Overloading Ostream Operator	Overload the « operator for Person class.	C++	Medium
Messages Order	Implement a software layer over the top of a network, such that sent messages are printed by the recipient in the order they were sent.	C++	Medium

Other Concepts

Name	Preview	Code	Difficulty
C++ Class Templates	Learn to use class templates. You are given a problem, solve that using class templates.	C++	Easy
Preprocessor Solution	Create preprocessor macros to make the existing code work.	C++	Easy
Operator Overloading	Learn how to overload operators. Print the sum of two matrices and print the resultant matrix.	C++	Medium
Overload Operators	Operator Overloading in C++.	C++	Easy
Attending Workshops	Define a structure for the workshop and find the number of workshops that the student can attend.	C++	Medium
C++ Class Template Specialization	Class templates in C++ create specializations for certain types. These can be used when difficult to provide a generic implementation.	C++	Medium
C++ Variadics	Create a function that takes an arbitrary number of binary digits as template parameters in reverse order and returns the value.	C++	Hard
Bit Array	Calculate the number of distinct integers created from the given code.	C++	Hard