Blizzard Finnegan
b92478b09c
Leap, Difference of Squares, Grains, Collatz Conjecture, Queen Attack, Darts, Hamming, and Space Age completed yesterday. Binary and Linked List completed today. |
||
|---|---|---|
| .. | ||
| .exercism | ||
| test-framework | ||
| HELP.md | ||
| makefile | ||
| nucleotide_count.c | ||
| nucleotide_count.h | ||
| README.md | ||
| test_nucleotide_count.c | ||
Nucleotide Count
Welcome to Nucleotide Count on Exercism's C Track.
If you need help running the tests or submitting your code, check out HELP.md.
Instructions
Each of us inherits from our biological parents a set of chemical instructions known as DNA that influence how our bodies are constructed. All known life depends on DNA!
Note: You do not need to understand anything about nucleotides or DNA to complete this exercise.
DNA is a long chain of other chemicals and the most important are the four nucleotides, adenine, cytosine, guanine and thymine. A single DNA chain can contain billions of these four nucleotides and the order in which they occur is important! We call the order of these nucleotides in a bit of DNA a "DNA sequence".
We represent a DNA sequence as an ordered collection of these four nucleotides and a common way to do that is with a string of characters such as "ATTACG" for a DNA sequence of 6 nucleotides. 'A' for adenine, 'C' for cytosine, 'G' for guanine, and 'T' for thymine.
Given a string representing a DNA sequence, count how many of each nucleotide is present. If the string contains characters that aren't A, C, G, or T then it is invalid and you should signal an error.
For example:
"GATTACA" -> 'A': 3, 'C': 1, 'G': 1, 'T': 2
"INVALID" -> error
Source
Created by
- @StevenRoot
Contributed to by
- @bcc32
- @Gamecock
- @h-3-0
- @patricksjackson
- @QLaille
- @ryanplusplus
- @siebenschlaefer
- @wolf99
Based on
The Calculating DNA Nucleotides_problem at Rosalind - http://rosalind.info/problems/dna/