Question

I need to learn this in c#

Requirements:

For this exercise you are to implement a small bioinformatics library for operations with DNA sequences, which, in this exercise, are represented as strings of only the characters A, C, G, and T. Three methods are required for this exercise and they are each detailed below.

Kmers

The term k-mer refers to all the possible substrings of length k that are contained in a DNA sequence. For example, given the DNA sequence AGATCGAGTG the 3-mers are:

AGA GAT ATC TCG CGA GAG AGT GTG

This method, Kmers, must take the following parameters in the order specified:

• an integer specifying k
• an arbitrary number of DNA sequences each provided as individual arguments

In the form of a string array, this method must return all the k-mers contained in the assembled sequence  where  is formed by concatenating all the provided DNA sequences in the order they are provided to the method.

ReverseComplement

The reverse complement of a sequence is formed by exchanging all of its nucleobases with their base complements, and then reversing the resulting sequence. The reverse complement of a DNA sequence is formed by exchanging all instances of:

• A with T
• T with A
• G with C
• C with G

and then reversing the resulting sequence.

For example, given the DNA sequence AAGCT the reverse complement is AGCTT

This method, ReverseComplement, must take the following parameter:

• a reference to a DNA sequence

This method should return void and mutate the referenced DNA sequence to its reverse complement.

Answer 1

here I am showing you complete program for getting a substring of given string in given string.

instead of string you can put the DNA sequence.

here I am not putting limitation on different type of character that you can choose. As you said only four characters but you can anything in this code.

// C++ program to print all possible
// substrings of a given string
#include<bits/stdc++.h>
using namespace std;

// Function to print all k-len sub strings
void subString(string s,int len)
{
// Pick starting point in outer loop
// and lengths of different strings for
// a given starting point
int n = s.length();
for (int i = 0; i <= n-len; i++) //here we each time moving to next element and printing the substring upto provided length.
cout << s.substr(i, len) << endl;
}

// Driver program to test above function
int main()
{
  
string str;
cout << "Enter a string: ";
getline(cin, str);
  
int len;
cout << "Enter a length of substring: ";
cin >> len;
  
subString(str,len);
return 0;
}