C impact and status on Exercism

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About C

Practice

85 contributors

1677 mentors

C Track Management

This page provides the Exercism community with the information and tools needed to manage the C track.

Students

91,242

Submissions

826,032

Mentoring Discussions

7,574

The C track needs attention ⚠️

Building

Practice Exercises

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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.

Synced primary repo: 8f455a5cdf794939cc4a74b25166729dbfd61df7 (Updates should be instant)

Next goal: Implement 131 practice exercises. Find out more.

82 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

67,206

242,034 (avg. 3.6)

29,565 (44.0%)

20 (0.0%)

Leap

1,662

4,898 (avg. 2.9)

1,287 (77.4%)

32 (1.9%)

Difference of Squares

3,605

16,108 (avg. 4.5)

3,015 (83.6%)

316 (8.8%)

Grains

4,195

29,076 (avg. 6.9)

3,291 (78.5%)

451 (10.8%)

Resistor Color

5,932

35,899 (avg. 6.1)

3,003 (50.6%)

637 (10.7%)

Collatz Conjecture

553

1,903 (avg. 3.4)

444 (80.3%)

26 (4.7%)

Queen Attack

653

2,370 (avg. 3.6)

491 (75.2%)

34 (5.2%)

Darts

2,082

4,408 (avg. 2.1)

1,429 (68.6%)

73 (3.5%)

Resistor Color Duo

1,270

2,524 (avg. 2.0)

951 (74.9%)

23 (1.8%)

Hamming

4,735

22,482 (avg. 4.7)

3,762 (79.5%)

583 (12.3%)

Space Age

1,121

2,855 (avg. 2.5)

855 (76.3%)

24 (2.1%)

RNA Transcription

920

2,907 (avg. 3.2)

702 (76.3%)

35 (3.8%)

Binary

1,029

6,562 (avg. 6.4)

783 (76.1%)

45 (4.4%)

Eliud's Eggs

106

392 (avg. 3.7)

68 (64.2%)

1 (0.9%)

Two Fer

616

1,924 (avg. 3.1)

479 (77.8%)

14 (2.3%)

Raindrops

831

2,420 (avg. 2.9)

647 (77.9%)

21 (2.5%)

D&D Character

247 (avg. 7.3)

20 (58.8%)

1 (2.9%)

Perfect Numbers

412

1,395 (avg. 3.4)

296 (71.8%)

4 (1.0%)

High Scores

355

2,101 (avg. 5.9)

248 (69.9%)

13 (3.7%)

Pangram

1,339

4,940 (avg. 3.7)

999 (74.6%)

47 (3.5%)

Resistor Color Trio

1,058

3,173 (avg. 3.0)

770 (72.8%)

21 (2.0%)

Armstrong Numbers

20,547

110,127 (avg. 5.4)

8,217 (40.0%)

1,732 (8.4%)

Isogram

8,949

83,890 (avg. 9.4)

4,858 (54.3%)

1,413 (15.8%)

Binary Search

2,555

21,208 (avg. 8.3)

1,687 (66.0%)

193 (7.6%)

Robot Simulator

893

2,922 (avg. 3.3)

593 (66.4%)

40 (4.5%)

Gigasecond

1,377

2,192 (avg. 1.6)

1,012 (73.5%)

132 (9.6%)

Triangle

580

2,472 (avg. 4.3)

371 (64.0%)

10 (1.7%)

Luhn

433

2,787 (avg. 6.4)

290 (67.0%)

15 (3.5%)

Allergies

899

4,045 (avg. 4.5)

612 (68.1%)

47 (5.2%)

Complex Numbers

470

1,245 (avg. 2.6)

357 (76.0%)

3 (0.6%)

Sum of Multiples

605

1,772 (avg. 2.9)

399 (66.0%)

10 (1.7%)

Clock

939

5,879 (avg. 6.3)

568 (60.5%)

41 (4.4%)

Rotational Cipher

117 (avg. 3.9)

20 (66.7%)

0 (0.0%)

Sieve

859

4,324 (avg. 5.0)

606 (70.5%)

38 (4.4%)

Square Root

2,914

11,309 (avg. 3.9)

1,977 (67.8%)

213 (7.3%)

Reverse String

1,048

9,104 (avg. 8.7)

750 (71.6%)

33 (3.1%)

Nucleotide Count

828

4,746 (avg. 5.7)

595 (71.9%)

20 (2.4%)

Protein Translation

557 (avg. 7.1)

55 (70.5%)

0 (0.0%)

Beer Song

774

3,145 (avg. 4.1)

501 (64.7%)

112 (14.5%)

Prime Factors

402

1,115 (avg. 2.8)

262 (65.2%)

6 (1.5%)

Nth Prime

454

1,433 (avg. 3.2)

295 (65.0%)

6 (1.3%)

All Your Base

434

1,577 (avg. 3.6)

226 (52.1%)

8 (1.8%)

Yacht

63 (avg. 3.2)

13 (65.0%)

0 (0.0%)

Scrabble Score

472

1,965 (avg. 4.2)

363 (76.9%)

21 (4.4%)

Sublist

340

1,237 (avg. 3.6)

196 (57.6%)

10 (2.9%)

Kindergarten Garden

375 (avg. 5.8)

39 (60.0%)

0 (0.0%)

Spiral Matrix

157 (avg. 3.2)

21 (42.9%)

0 (0.0%)

Grade School

2,401

25,201 (avg. 10.5)

965 (40.2%)

162 (6.7%)

Rational Numbers

1,199

11,155 (avg. 9.3)

724 (60.4%)

85 (7.1%)

Circular Buffer

1,586

15,411 (avg. 9.7)

799 (50.4%)

101 (6.4%)

List Ops

1,280

8,968 (avg. 7.0)

686 (53.6%)

77 (6.0%)

Saddle Points

703

4,184 (avg. 6.0)

396 (56.3%)

36 (5.1%)

Phone Number

758

6,412 (avg. 8.5)

491 (64.8%)

47 (6.2%)

Pascal's Triangle

762

3,557 (avg. 4.7)

465 (61.0%)

37 (4.9%)

Acronym

2,041

9,330 (avg. 4.6)

1,352 (66.2%)

119 (5.8%)

Matching Brackets

722

2,570 (avg. 3.6)

488 (67.6%)

51 (7.1%)

Roman Numerals

898

14,069 (avg. 15.7)

589 (65.6%)

71 (7.9%)

Anagram

584

1,862 (avg. 3.2)

384 (65.8%)

15 (2.6%)

Bob

731

3,806 (avg. 5.2)

524 (71.7%)

20 (2.7%)

Secret Handshake

534

2,969 (avg. 5.6)

367 (68.7%)

16 (3.0%)

ETL

354

1,422 (avg. 4.0)

230 (65.0%)

7 (2.0%)

Series

472

2,025 (avg. 4.3)

298 (63.1%)

6 (1.3%)

Diamond

346

1,317 (avg. 3.8)

229 (66.2%)

6 (1.7%)

Minesweeper

350

1,382 (avg. 3.9)

202 (57.7%)

8 (2.3%)

Run-Length Encoding

318

1,662 (avg. 5.2)

189 (59.4%)

8 (2.5%)

Atbash Cipher

409

1,596 (avg. 3.9)

277 (67.7%)

32 (7.8%)

Pythagorean Triplet

962

4,932 (avg. 5.1)

465 (48.3%)

49 (5.1%)

Linked List

1,002

7,376 (avg. 7.4)

518 (51.7%)

79 (7.9%)

Word Count

1,593

4,194 (avg. 2.6)

740 (46.5%)

194 (12.2%)

Rail Fence Cipher

398

2,179 (avg. 5.5)

253 (63.6%)

9 (2.3%)

Meetup

660

1,199 (avg. 1.8)

348 (52.7%)

10 (1.5%)

Pig Latin

341

2,348 (avg. 6.9)

210 (61.6%)

9 (2.6%)

Wordy

335

1,659 (avg. 5.0)

211 (63.0%)

12 (3.6%)

Crypto Square

266

1,163 (avg. 4.4)

166 (62.4%)

1 (0.4%)

Largest Series Product

385

1,999 (avg. 5.2)

249 (64.7%)

8 (2.1%)

Zebra Puzzle

334 (avg. 8.6)

14 (35.9%)

0 (0.0%)

Two Bucket

221

1,040 (avg. 4.7)

134 (60.6%)

3 (1.4%)

Binary Search Tree

496

2,190 (avg. 4.4)

265 (53.4%)

30 (6.0%)

Say

277

1,530 (avg. 5.5)

155 (56.0%)

4 (1.4%)

Knapsack

101 (avg. 2.8)

20 (55.6%)

0 (0.0%)

Palindrome Products

368

1,462 (avg. 4.0)

189 (51.4%)

12 (3.3%)

React

666

3,047 (avg. 4.6)

163 (24.5%)

19 (2.9%)

49 unimplemented practice exercises

Affine Cipher

Alphametics

Bank Account

Book Store

Bottle Song

Bowling

Change

Connect

Conway's Game of Life

Custom Set

Dominoes

DOT DSL

Error Handling

Flatten Array

Food Chain

Forth

Go Counting

Grep

Hangman

House

ISBN Verifier

Killer Sudoku Helper

Ledger

Lens Person

Markdown

Matrix

Micro Blog

OCR Numbers

PaaS I/O

Parallel Letter Frequency

Poker

POV

Proverb

Rectangles

REST API

Robot Name

Satellite

SGF Parsing

Simple Cipher

Simple Linked List

State of Tic-Tac-Toe

Strain

Tournament

Transpose

Tree Building

Twelve Days

Variable Length Quantity

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Word Search

View data

Zipper

View data

Programming Tags

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Help manage the tags used to group, filter and recommend solutions, approaches and articles.

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Test Runner

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

Current version: 53572d2c7c9d8425522799a83069be9a8db1dd08 (Takes up to 10 mins to deploy)

Total Test Runner Runs

798,977

Test Run Pass Rate

13.1% (104277)

Test Run Fail Rate

20.2% (161504)

Test Run Error Rate

66.7% (533196)

Representer

Learn More

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.

Analyzer

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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.

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