# Reports:Tasks not implemented in C

**Awareness**

If

**C**is a language you like, or are interested in, please inform your fellow members of the C community; this page can't be emptied without your and their participation.

## Contents

## Not implemented[edit]

These are currently not implemented in C. Please implement some if you can. If any tasks are not possible or too complex in C, they should not be on this list. To mark a task as such, add **{{omit from|C}}**, preserving the capitalization of the language, to that task. It will appear below under the "Not Considered" section.

### C

### E

### F

### I

### M

### O

### P

### R

### S

### Draft tasks without implementation[edit]

These tasks are drafts, meaning they largely need more work to turn them into full tasks. Perhaps you can help by trying to implement them in C (after all, one of the key requirements for a task being non-draft is multiple implementations, preferably in widely different languages) but be aware that this may be difficult because of lack of definition of the task itself.

### A

### B

### C

- CLI-based maze-game
- Change e letters to i in words
- Checksumcolor
- Chess player
- Code segment unload
- Combinations with repetitions/Square digit chain
- Common list elements
- Common sorted list
- Consecutive Primes With Ascending Or Descending Differences
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n)
- Continued fraction/Arithmetic/G(matrix ng, continued fraction n1, continued fraction n2)
- Coprime triplets
- Count the coins/0-1
- Cubic Special Primes
- Curve that touches three points

### D

### F

- Fibonacci heap
- Fibonacci matrix-exponentiation
- Find URI in text
- Find first missing positive
- Find prime n for that reversed n is also prime
- Find words which contains all the vowels
- Find words which contains most consonants
- Find words which first and last three letters are equals
- Free polyominoes enumeration
- Frobenius numbers

### G

### L

### M

### P

- Palindromic primes
- Parse EBNF
- Particle swarm optimization
- Penrose tiling
- Pentomino tiling
- Perceptron
- Permutations with some identical elements
- Pisano period
- Polynomial synthetic division
- Powerful numbers
- Practical numbers
- Price list behind API
- Prime triplets
- Prime words
- Primes with digits in nondecreasing order
- Print itself
- Process SMIL directives in XML data
- Pseudorandom number generator image

### R

### S

- Safe mode
- Selective file copy
- Self-hosting compiler
- Separate the house number from the street name
- Sierpinski curve
- Sierpinski square curve
- Simulated annealing
- Sine wave
- Smallest enclosing circle problem
- Smallest numbers
- Smallest square that begins with n
- Solve a Rubik's Cube
- Solve triangle solitare puzzle
- Solving coin problems
- Special Divisors
- Square root by hand
- Starting a web browser
- Strange numbers
- Strange unique prime triplets
- Strassen's algorithm
- Substring primes
- Suffix tree
- Summarize primes

### T

### U

### V

## Requiring Attention[edit]

### Examples[edit]

These tasks have implementations in C, but somebody, somewhere, decided that the example implementation was faulty or in some other way requiring attention. If you're familiar with the task and language, please consider reviewing/correcting the example and removing the notice.

### B

### N

### P

### R

### Other pages[edit]

These are other pages related to C which require attention; with your knowledge and assistance, we can improve the quality of the site's content.

## Not Considered[edit]

These tasks are not generally counted toward "unimplemented", as somebody, somewhere, decided that C was inappropriate for these tasks, or implementations of them would be unenlightening. Feel free to try your hand at them anyway.

### R

## End of List[edit]

Again, feel free to try your hand at any of the tasks listed on this page.