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CoursesCSC122โปรแกรมแสดงรูปแบบของดีเอ็นเอ

โปรแกรมแสดงรูปแบบของดีเอ็นเอ

โจทย์

Write a program to print Double DNA strains from a given single strain as example output. The other strain is generated by providing a pair of DNA using the following rules:

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

Noted that the length of string: 0 < n <= 50.

Input:

AACGGTAAGAGGCTC

Output:

A - - T
 A - - T
  C - - G
   G - - C
  G - - C
 T - - A
A - - T
A - - T
 G - - C
  A - - T
   G - - C
  G - - C
 C - - G
T - - A
C - - G

โค้ด

import java.util.Map;
import java.util.Scanner;
 
public class Program {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String dna = scanner.nextLine().toUpperCase();
 
        int space = 0;
        boolean forward = true;
 
        Map<Character, String> nucleotidePairs = Map.of(
                'A', "T",
                'G', "C",
                'C', "G",
                'T', "A"
        );
 
        for (char nucleotide : dna.toCharArray()) {
            String paired = nucleotidePairs.getOrDefault(nucleotide, "");
 
            String spaces = " ".repeat(Math.max(0, space));
 
            System.out.printf("%s%c - - %s\n", spaces, nucleotide, paired);
 
            if (forward) {
                space++;
                if (space > 2) {
                    forward = false;
                }
            } else {
                space--;
                if (space < 0) {
                    forward = true;
                    space = 0;
                }
            }
        }
    }
}

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