Exercises on the C Track | Exercism

Hello World

The classical introductory exercise. Just say "Hello, World!"

Armstrong Numbers

Determine if a number is an Armstrong number

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Darts

Write a function that returns the earned points in a single toss of a Darts game

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Resistor Color

Convert a resistor band's color to its numeric representation

Resistor Color Duo

Convert color codes, as used on resistors, to a numeric value.

Resistor Color Trio

Convert color codes, as used on resistors, to a human-readable label.

Isogram

Determine if a word or phrase is an isogram.

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control flow loops

Acronym

Convert a long phrase to its acronym

control flow loops

memory management

Word Count

Given a phrase, count the occurrences of each word in that phrase.

memory management

Pangram

Determine if a sentence is a pangram.

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control flow loops

Gigasecond

Given a moment, determine the moment that would be after a gigasecond has passed.

Space Age

Given an age in seconds, calculate how old someone is in terms of a given planet's solar years.

Meetup

Calculate the date of meetups.

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preprocessor x macros in test

Hamming

Calculate the Hamming difference between two DNA strands.

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RNA Transcription

Given a DNA strand, return its RNA Complement Transcription.

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Nucleotide Count

Given a DNA string, compute how many times each nucleotide occurs in the string.

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memory management

text formatting

Grains

Calculate the number of grains of wheat on a chessboard given that the number on each square doubles.

bitwise operations

control flow loops

performance optimizations

Leap

Given a year, report if it is a leap year.

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Beer Song

Produce the lyrics to that beloved classic, that field-trip favorite: 99 Bottles of Beer on the Wall.

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Raindrops

Convert a number to a string, the content of which depends on the number's factors.

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Bob

Bob is a lackadaisical teenager. In conversation, his responses are very limited.

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Difference Of Squares

Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.

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Sum Of Multiples

Given a number, find the sum of all the multiples of particular numbers up to but not including that number.

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Binary Search

Implement a binary search algorithm.

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Anagram

Given a word and a list of possible anagrams, select the correct sublist.

Roman Numerals

Write a function to convert from normal numbers to Roman Numerals.

control flow loops

memory management

Saddle Points

Detect saddle points in a matrix.

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control flow loops

memory management

flexible array members

Allergies

Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.

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control flow loops

memory management

Atbash Cipher

Create an implementation of the atbash cipher, an ancient encryption system created in the Middle East.

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Series

Given a string of digits, output all the contiguous substrings of length `n` in that string.

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memory management

text formatting

React

Implement a basic reactive system.

memory management

Phone Number

Clean up user-entered phone numbers so that they can be sent SMS messages.

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memory management

Clock

Implement a clock that handles times without dates.

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preprocessor x macros in test

text formatting

Sieve

Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.

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memory management

Nth Prime

Given a number n, determine what the nth prime is.

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performance optimizations

Robot Simulator

Write a robot simulator.

control flow if statements

variable argument lists

Pascal's Triangle

Compute Pascal's triangle up to a given number of rows.

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memory management

Triangle

Determine if a triangle is equilateral, isosceles, or scalene.

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Perfect Numbers

Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for natural numbers.

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Collatz Conjecture

Calculate the number of steps to reach 1 using the Collatz conjecture

Binary

Convert a binary number, represented as a string (e.g. '101010'), to its decimal equivalent using first principles

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All Your Base

Convert a number, represented as a sequence of digits in one base, to any other base.

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Palindrome Products

Detect palindrome products in a given range.

Sublist

Write a function to determine if a list is a sublist of another list.

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Largest Series Product

Given a string of digits, calculate the largest product for a contiguous substring of digits of length n.

control flow loops

performance optimizations

Scrabble Score

Given a word, compute the Scrabble score for that word.

Queen Attack

Given the position of two queens on a chess board, indicate whether or not they are positioned so that they can attack each other.

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Linked List

Implement a doubly linked list

Complex Numbers

Implement complex numbers.

performance optimizations

ETL

We are going to do the `Transform` step of an Extract-Transform-Load.

Prime Factors

Compute the prime factors of a given natural number.

Luhn

Given a number determine whether or not it is valid per the Luhn formula.

Matching Brackets

Make sure the brackets and braces all match.

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Say

Given a number from 0 to 999,999,999,999, spell out that number in English.

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Crypto Square

Implement the classic method for composing secret messages called a square code.

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Secret Handshake

Given a decimal number, convert it to the appropriate sequence of events for a secret handshake.

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Pig Latin

Implement a program that translates from English to Pig Latin

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Minesweeper

Add the numbers to a minesweeper board

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Run Length Encoding

Implement run-length encoding and decoding.

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Two Fer

Create a sentence of the form "One for X, one for me."

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Wordy

Parse and evaluate simple math word problems returning the answer as an integer.

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Binary Search Tree

Insert and search for numbers in a binary tree.

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Diamond

Given a letter, print a diamond starting with 'A' with the supplied letter at the widest point.

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