HackerRank C++ Solutions

https://www.hackerrank.com/profile/mourad_smail

A collection of C++ solutions to HackerRank problems covering core language features and the Standard Template Library (STL).

Topics Covered

File	Topic	Description
BasicDataTypes.cpp	Basics	Demonstrates C++ primitive data types: int, long, char, float, and double
InputandOutput.cpp	Basics	Reads three integers and prints their sum
ConditionalStatements.cpp	Conditionals	Maps an integer to its English word representation, or classifies it as even/odd
ForLoop.cpp	Loops	Iterates over a range and converts numbers to text (one–nine) or classifies them as even/odd
Functions.cpp	Functions	Returns the maximum of four integers
Pointer.cpp	Pointers	Swaps two values and computes their sum and absolute difference using pointers
ArraysIntroduction.cpp	Arrays	Reads an array and prints it in reverse
Strings.cpp	Strings	Concatenates two strings and swaps their first characters
StringStream.cpp	Strings / STL	Parses a comma-separated string of integers into a vector using std::stringstream
Structs.cpp	Structs	Defines a Student struct with age, first_name, last_name, and standard fields
Class.cpp	Classes	Implements a Student class with private members and public getters/setters
ClassesandObjects.cpp	Classes	Student class that stores five test scores and computes the total
0.cpp	Classes	Box class with default, parameterized, and copy constructors, plus dimension getters
Vector-Sort.cpp	STL – Vector	Reads integers into a vector and sorts them in ascending order
Vector-Erase.cpp	STL – Vector	Erases elements from a vector by single index and by range
VariableSizedArrays.cpp	STL – Vector	Builds a jagged 2-D array (vector of vectors) and answers element queries
Maps-STL.cpp	STL – Map	Manages a map<string, int> with insert, erase, and find operations
LowerBound-STL.cpp	STL – Algorithm	Uses std::lower_bound on a sorted vector to search for a target value

Prerequisites

• A C++ compiler that supports C++11 or later (e.g., g++, clang++)

Compiling and Running

g++ -std=c++14 -o solution <filename>.cpp
./solution

For example:

g++ -std=c++14 -o sort Vector-Sort.cpp
./sort

License

This project is open source and available under the MIT License.