C++

88,232 students

84 contributors

88,226
students have developed their C++ skills on Exercism.

Students

88,226

Submissions

619,118

Mentoring Discussions

10,830

The C++ track needs attention ⚠️

Building

Build

Use your knowledge to build the C++ track itself

84 contributors

Build Test Runners

Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Usage statistics

Total Test Runner Runs

568,585

Test Run Pass Rate

17.6% (100250)

Test Run Fail Rate

18.0% (102326)

Test Run Error Rate

64.4% (366009)

Build Analyzers

Build an Analyzer for C++: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.

Build Representers

Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Create Practice Exercises

Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Next goal: Implement 132 practice exercises. Find out more.

Usage statistics

61 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

55,440

151,270 (avg. 2.7)

27,841 (50.2%)

12 (0.0%)

Leap

20,179

79,781 (avg. 4.0)

9,467 (46.9%)

2,471 (12.2%)

Reverse String

10,596

66,954 (avg. 6.3)

6,131 (57.9%)

1,451 (13.7%)

Space Age

5,999

47,290 (avg. 7.9)

3,129 (52.2%)

1,094 (18.2%)

Triangle

3,988

29,476 (avg. 7.4)

2,466 (61.8%)

741 (18.6%)

Grains

2,784

18,182 (avg. 6.5)

2,250 (80.8%)

581 (20.9%)

Raindrops

2,317

9,673 (avg. 4.2)

2,027 (87.5%)

494 (21.3%)

Pangram

2,142

15,471 (avg. 7.2)

1,731 (80.8%)

469 (21.9%)

Two Fer

2,004

8,144 (avg. 4.1)

1,662 (82.9%)

78 (3.9%)

Grade School

2,372

18,143 (avg. 7.6)

1,537 (64.8%)

203 (8.6%)

Hamming

3,963

9,974 (avg. 2.5)

3,194 (80.6%)

354 (8.9%)

Nucleotide Count

2,513

12,813 (avg. 5.1)

1,787 (71.1%)

270 (10.7%)

RNA Transcription

1,778

7,579 (avg. 4.3)

1,465 (82.4%)

162 (9.1%)

Collatz Conjecture

1,323

6,005 (avg. 4.5)

1,102 (83.3%)

48 (3.6%)

Difference of Squares

2,109

4,973 (avg. 2.4)

1,769 (83.9%)

158 (7.5%)

Nth Prime

1,515

9,383 (avg. 6.2)

997 (65.8%)

116 (7.7%)

Queen Attack

1,252

8,143 (avg. 6.5)

818 (65.3%)

90 (7.2%)

Sieve

1,169

4,671 (avg. 4.0)

889 (76.0%)

106 (9.1%)

Say

1,137

7,637 (avg. 6.7)

597 (52.5%)

100 (8.8%)

Gigasecond

2,406

4,148 (avg. 1.7)

1,614 (67.1%)

251 (10.4%)

Secret Handshake

749

3,307 (avg. 4.4)

593 (79.2%)

35 (4.7%)

Allergies

873

3,990 (avg. 4.6)

627 (71.8%)

44 (5.0%)

Protein Translation

670

3,176 (avg. 4.7)

535 (79.9%)

34 (5.1%)

Sum of Multiples

1,175

3,795 (avg. 3.2)

886 (75.4%)

67 (5.7%)

Prime Factors

867

2,365 (avg. 2.7)

661 (76.2%)

44 (5.1%)

Robot Name

1,116

4,977 (avg. 4.5)

768 (68.8%)

96 (8.6%)

Clock

756

2,622 (avg. 3.5)

422 (55.8%)

38 (5.0%)

Meetup

608

982 (avg. 1.6)

333 (54.8%)

21 (3.5%)

Beer Song

664

2,925 (avg. 4.4)

495 (74.5%)

31 (4.7%)

Atbash Cipher

635

4,403 (avg. 6.9)

470 (74.0%)

30 (4.7%)

Trinary

740

2,261 (avg. 3.1)

622 (84.1%)

20 (2.7%)

Binary Search

715

3,932 (avg. 5.5)

484 (67.7%)

32 (4.5%)

Phone Number

775

2,350 (avg. 3.0)

559 (72.1%)

37 (4.8%)

Series

528

1,903 (avg. 3.6)

397 (75.2%)

18 (3.4%)

Complex Numbers

608

2,408 (avg. 4.0)

402 (66.1%)

17 (2.8%)

Food Chain

755

1,485 (avg. 2.0)

541 (71.7%)

26 (3.4%)

Roman Numerals

578

1,720 (avg. 3.0)

417 (72.1%)

18 (3.1%)

Bob

2,004

4,593 (avg. 2.3)

1,670 (83.3%)

233 (11.6%)

Word Count

1,165

3,051 (avg. 2.6)

894 (76.7%)

83 (7.1%)

Circular Buffer

508

2,952 (avg. 5.8)

292 (57.5%)

35 (6.9%)

Crypto Square

485

2,095 (avg. 4.3)

318 (65.6%)

13 (2.7%)

ETL

1,088

1,933 (avg. 1.8)

884 (81.3%)

39 (3.6%)

Matching Brackets

609

2,446 (avg. 4.0)

446 (73.2%)

25 (4.1%)

Anagram

1,332

2,980 (avg. 2.2)

1,040 (78.1%)

89 (6.7%)

Binary Search Tree

749

2,608 (avg. 3.5)

223 (29.8%)

29 (3.9%)

Luhn

561

3,126 (avg. 5.6)

414 (73.8%)

30 (5.3%)

Acronym

627

2,233 (avg. 3.6)

466 (74.3%)

26 (4.1%)

Armstrong Numbers

617

2,039 (avg. 3.3)

493 (79.9%)

23 (3.7%)

Binary

895

2,679 (avg. 3.0)

702 (78.4%)

78 (8.7%)

Hexadecimal

681

1,732 (avg. 2.5)

520 (76.4%)

60 (8.8%)

Isogram

2,141

3,322 (avg. 1.6)

1,299 (60.7%)

91 (4.3%)

Pascal's Triangle

569

1,762 (avg. 3.1)

425 (74.7%)

23 (4.0%)

Perfect Numbers

31

106 (avg. 3.4)

28 (90.3%)

0 (0.0%)

Scrabble Score

925

2,237 (avg. 2.4)

677 (73.2%)

83 (9.0%)

All Your Base

541

1,590 (avg. 2.9)

342 (63.2%)

38 (7.0%)

Robot Simulator

924

2,845 (avg. 3.1)

501 (54.2%)

45 (4.9%)

Bank Account

253

855 (avg. 3.4)

115 (45.5%)

17 (6.7%)

Darts

183

709 (avg. 3.9)

141 (77.0%)

5 (2.7%)

Largest Series Product

111

559 (avg. 5.0)

82 (73.9%)

3 (2.7%)

Isbn Verifier

198

1,275 (avg. 6.4)

133 (67.2%)

7 (3.5%)

Simple linked list

165

1,043 (avg. 6.3)

87 (52.7%)

5 (3.0%)

71 unimplemented practice exercises

Affine Cipher

Alphametics

Book Store

Bottle Song

Bowling

Change

Connect

Custom Set

D&D Character

DOT DSL

Diamond

Dominoes

Error Handling

Flatten Array

Forth

Go Counting

Grep

Hangman

High Scores

House

Killer Sudoku Helper

Kindergarten Garden

Knapsack

Ledger

Lens Person

Linked List

List Ops

Markdown

Matrix

Micro Blog

Minesweeper

OCR Numbers

POV

PaaS I/O

Palindrome Products

Parallel Letter Frequency

Pig Latin

Poker

Proverb

Pythagorean Triplet

REST API

Rail Fence Cipher

Rational Numbers

React

Rectangles

Resistor Color

Resistor Color Duo

Resistor Color Trio

Rotational Cipher

Run-Length Encoding

SGF Parsing

Saddle Points

Satellite

Scale Generator

Simple Cipher

Spiral Matrix

Square Root

State of Tic-Tac-Toe

Strain

Sublist

Tournament

Transpose

Tree Building

Twelve Days

Two Bucket

Variable Length Quantity

Word Search

Wordy

Yacht

Zebra Puzzle

Zipper

1 foregone practice exercise

Point Mutations

Volunteers

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1,775

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1,760

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