C impact and status on Exercism

162,325 students

About C

Practice

429 contributors

1875 mentors

C Track Management

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

Students

162,325

Submissions

2,015,569

Mentoring Discussions

11,085

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: a747a6e6a6e55c6e0f34f238b648f60db2317691 (Updates should be instant)

Next goal: Implement 140 practice exercises. Find out more.

84 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

135,162

415,121 (avg. 3.1)

64,643 (47.8%)

20 (0.0%)

Leap

30,412

141,371 (avg. 4.6)

15,556 (51.2%)

974 (3.2%)

Difference of Squares

17,799

94,963 (avg. 5.3)

12,976 (72.9%)

755 (4.2%)

Grains

14,785

120,025 (avg. 8.1)

10,995 (74.4%)

747 (5.1%)

Resistor Color

13,864

99,537 (avg. 7.2)

7,641 (55.1%)

787 (5.7%)

Collatz Conjecture

6,386

34,773 (avg. 5.4)

5,434 (85.1%)

175 (2.7%)

Queen Attack

5,527

37,144 (avg. 6.7)

4,273 (77.3%)

143 (2.6%)

Darts

6,637

33,310 (avg. 5.0)

4,727 (71.2%)

148 (2.2%)

Resistor Color Duo

4,595

18,174 (avg. 4.0)

3,711 (80.8%)

60 (1.3%)

Hamming

8,020

39,479 (avg. 4.9)

6,728 (83.9%)

653 (8.1%)

Space Age

4,447

22,167 (avg. 5.0)

3,704 (83.3%)

86 (1.9%)

RNA Transcription

3,859

30,462 (avg. 7.9)

3,227 (83.6%)

118 (3.1%)

Binary

4,244

32,379 (avg. 7.6)

3,457 (81.5%)

122 (2.9%)

Eliud's Eggs

2,705

11,587 (avg. 4.3)

2,280 (84.3%)

42 (1.6%)

Two Fer

3,272

18,164 (avg. 5.6)

2,763 (84.4%)

52 (1.6%)

Raindrops

3,305

17,282 (avg. 5.2)

2,795 (84.6%)

63 (1.9%)

D&D Character

2,421

16,160 (avg. 6.7)

1,918 (79.2%)

60 (2.5%)

Perfect Numbers

2,536

13,712 (avg. 5.4)

2,113 (83.3%)

45 (1.8%)

High Scores

2,600

20,917 (avg. 8.0)

2,003 (77.0%)

70 (2.7%)

Pangram

3,371

22,025 (avg. 6.5)

2,714 (80.5%)

97 (2.9%)

Resistor Color Trio

2,718

19,984 (avg. 7.4)

2,100 (77.3%)

52 (1.9%)

Armstrong Numbers

22,407

120,725 (avg. 5.4)

9,978 (44.5%)

1,780 (7.9%)

Isogram

10,601

94,638 (avg. 8.9)

6,363 (60.0%)

1,451 (13.7%)

Binary Search

4,521

35,437 (avg. 7.8)

3,263 (72.2%)

233 (5.2%)

Robot Simulator

2,681

11,979 (avg. 4.5)

2,043 (76.2%)

80 (3.0%)

Gigasecond

2,871

8,617 (avg. 3.0)

2,259 (78.7%)

148 (5.2%)

Triangle

2,319

11,492 (avg. 5.0)

1,778 (76.7%)

29 (1.3%)

Luhn

2,410

23,505 (avg. 9.8)

1,749 (72.6%)

70 (2.9%)

Allergies

2,521

13,944 (avg. 5.5)

1,776 (70.4%)

83 (3.3%)

Complex Numbers

1,957

7,353 (avg. 3.8)

1,591 (81.3%)

20 (1.0%)

Sum of Multiples

1,959

11,528 (avg. 5.9)

1,506 (76.9%)

39 (2.0%)

Clock

2,178

17,154 (avg. 7.9)

1,512 (69.4%)

59 (2.7%)

Rotational Cipher

1,209

7,746 (avg. 6.4)

1,050 (86.8%)

24 (2.0%)

Sieve

1,923

10,312 (avg. 5.4)

1,529 (79.5%)

58 (3.0%)

Square Root

4,054

15,301 (avg. 3.8)

2,892 (71.3%)

224 (5.5%)

Reverse String

2,621

19,089 (avg. 7.3)

2,054 (78.4%)

63 (2.4%)

Nucleotide Count

1,867

13,141 (avg. 7.0)

1,508 (80.8%)

38 (2.0%)

Protein Translation

1,120

7,753 (avg. 6.9)

906 (80.9%)

16 (1.4%)

Beer Song

1,735

10,919 (avg. 6.3)

1,282 (73.9%)

124 (7.1%)

Prime Factors

1,394

4,615 (avg. 3.3)

1,126 (80.8%)

19 (1.4%)

Nth Prime

1,417

5,754 (avg. 4.1)

1,136 (80.2%)

17 (1.2%)

All Your Base

1,351

9,247 (avg. 6.8)

931 (68.9%)

20 (1.5%)

Yacht

892

5,717 (avg. 6.4)

755 (84.6%)

15 (1.7%)

Scrabble Score

1,418

4,910 (avg. 3.5)

1,203 (84.8%)

28 (2.0%)

Sublist

1,210

5,442 (avg. 4.5)

931 (76.9%)

20 (1.7%)

Kindergarten Garden

912

4,954 (avg. 5.4)

732 (80.3%)

12 (1.3%)

Variable Length Quantity

306

2,627 (avg. 8.6)

216 (70.6%)

5 (1.6%)

Spiral Matrix

841

5,163 (avg. 6.1)

632 (75.1%)

10 (1.2%)

Grade School

3,107

29,842 (avg. 9.6)

1,518 (48.9%)

174 (5.6%)

Rational Numbers

1,879

15,715 (avg. 8.4)

1,276 (67.9%)

92 (4.9%)

Circular Buffer

2,478

21,821 (avg. 8.8)

1,433 (57.8%)

112 (4.5%)

List Ops

2,037

13,931 (avg. 6.8)

1,298 (63.7%)

81 (4.0%)

Saddle Points

1,361

8,109 (avg. 6.0)

905 (66.5%)

42 (3.1%)

Phone Number

1,450

10,431 (avg. 7.2)

1,076 (74.2%)

56 (3.9%)

Pascal's Triangle

1,434

6,456 (avg. 4.5)

1,041 (72.6%)

43 (3.0%)

Acronym

2,756

12,878 (avg. 4.7)

1,970 (71.5%)

126 (4.6%)

Matching Brackets

1,453

5,480 (avg. 3.8)

1,110 (76.4%)

61 (4.2%)

Roman Numerals

1,667

26,239 (avg. 15.7)

1,215 (72.9%)

80 (4.8%)

Anagram

1,265

4,540 (avg. 3.6)

954 (75.4%)

21 (1.7%)

Bob

1,396

7,041 (avg. 5.0)

1,105 (79.2%)

26 (1.9%)

Secret Handshake

1,151

5,737 (avg. 5.0)

918 (79.8%)

25 (2.2%)

ETL

956

3,572 (avg. 3.7)

752 (78.7%)

14 (1.5%)

Series

1,093

3,929 (avg. 3.6)

843 (77.1%)

13 (1.2%)

Diamond

954

3,292 (avg. 3.5)

763 (80.0%)

12 (1.3%)

Flower Field

226

1,244 (avg. 5.5)

165 (73.0%)

3 (1.3%)

Run-Length Encoding

955

4,411 (avg. 4.6)

724 (75.8%)

16 (1.7%)

Atbash Cipher

995

3,982 (avg. 4.0)

790 (79.4%)

38 (3.8%)

Pythagorean Triplet

1,539

7,515 (avg. 4.9)

928 (60.3%)

54 (3.5%)

Linked List

1,850

12,188 (avg. 6.6)

1,107 (59.8%)

89 (4.8%)

Word Count

2,218

6,778 (avg. 3.1)

1,246 (56.2%)

201 (9.1%)

Rail Fence Cipher

944

4,033 (avg. 4.3)

697 (73.8%)

12 (1.3%)

Meetup

1,203

2,676 (avg. 2.2)

824 (68.5%)

13 (1.1%)

Pig Latin

908

4,759 (avg. 5.2)

677 (74.6%)

15 (1.7%)

Wordy

881

3,776 (avg. 4.3)

675 (76.6%)

16 (1.8%)

Crypto Square

814

3,250 (avg. 4.0)

634 (77.9%)

5 (0.6%)

Largest Series Product

950

3,555 (avg. 3.7)

740 (77.9%)

14 (1.5%)

Zebra Puzzle

632

1,960 (avg. 3.1)

457 (72.3%)

1 (0.2%)

Two Bucket

753

3,041 (avg. 4.0)

528 (70.1%)

4 (0.5%)

Binary Search Tree

1,207

5,341 (avg. 4.4)

777 (64.4%)

43 (3.6%)

Say

829

3,458 (avg. 4.2)

595 (71.8%)

7 (0.8%)

Knapsack

700

2,377 (avg. 3.4)

464 (66.3%)

5 (0.7%)

Palindrome Products

1,052

4,258 (avg. 4.0)

636 (60.5%)

21 (2.0%)

React

1,550

5,501 (avg. 3.5)

579 (37.4%)

29 (1.9%)

Intergalactic Transmission

262

1,875 (avg. 7.2)

127 (48.5%)

5 (1.9%)

1 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Minesweeper

792

2,780 (avg. 3.5)

593 (74.9%)

10 (1.3%)

56 unimplemented practice exercises

Affine Cipher

Alphametics

Baffling Birthdays

Bank Account

Book Store

Bottle Song

Bowling

Camicia

Change

Connect

Conway's Game of Life

Custom Set

Dominoes

DOT DSL

Error Handling

Flatten Array

Food Chain

Forth

Go Counting

Grep

House

ISBN Verifier

Killer Sudoku Helper

Ledger

Lens Person

Line Up

Markdown

Matrix

Micro Blog

OCR Numbers

PaaS I/O

Parallel Letter Frequency

Piecing It Together

Poker

POV

Prism

Proverb

Rectangles

Relative Distance

REST API

Robot Name

Satellite

Save the Cow

SGF Parsing

Simple Cipher

Simple Linked List

Split-Second Stopwatch

State of Tic-Tac-Toe

Strain

Swift Scheduling

Tournament

Transpose

Tree Building

Twelve Days

Word Search

Zipper

Test Runner

Learn More

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

Current version: 4dbbca58d7df2804c98da6a40c1862cfbe5e9bae (Takes up to 10 mins to deploy)

Total Test Runner Runs

1,980,927

Test Run Pass Rate

16.4% (325264)

Test Run Fail Rate

23.5% (464969)

Test Run Error Rate

60.1% (1190694)

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

Learn More

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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