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Description
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Write a static method <tt>complementWC(String dna)</tt>
that takes a String containing only the capital letters <tt>A</tt>, <tt>C</tt>,
<tt>T</tt>, <tt>G</tt>,
(representing DNA), and returns its <i>Watson-Crick complement</i>:
replace <tt>A</tt> with <tt>T</tt>, <tt>C</tt> with <tt>G</tt>, and vice-versa.

<p>For example, <tt>complementWC("GATTACA")</tt> should return
<tt>"CTAATGT"</tt>. (You may assume the input is valid, there is no need
to check for non-DNA characters.)

<p>
We encourage you to
review the <a href="http://introcs.cs.princeton.edu/java/11cheatsheet/#String">
abbreviated String API</a> on the introcs cheatsheet. If you do this,
you can solve this problem without using any loops.

Epilogue
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Remarks
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Engine
Choices
json list of string, bool pairs
e.g. [["good", true], ["bad", false]]

Correct answer
Template / Reference solution

public static String complementWC(String dna) {
// replace all 'C's with 'G's and vice-versa
\[
String tmp = dna.replaceAll("C", "X");
tmp = tmp.replaceAll("G", "C");
tmp = tmp.replaceAll("X", "G");
]\
// replace all 'A's with 'T's and vice-versa
\[
tmp = tmp.replaceAll("A", "X");
tmp = tmp.replaceAll("T", "A");
tmp = tmp.replaceAll("X", "T");
]\
return \[tmp;]\
}
Template / Reference solution

Java test suite
See manual

test("complementWC", "GATTACA");
test("complementWC", "CAT");
test("complementWC", "TAGACAT");
test("complementWC", "GCGAGTGAGC");
test("complementWC", "");

C++ test suite
json list of stdin/args tests
e.g. [{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]
to just run once with no input use [{}]

C++ test suite
See manual

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json list of strings
e.g. ["for","while"]

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e.g. ["java.util.*"]

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e.g. ["DataStructure"]

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i.e., just a demo
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json list of flags
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json list of flags
see default_cppflags
e.g. ["-Wno-write-strings"]

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Property	Value
Description html markup shown to student	Write a static method <tt>complementWC(String dna)</tt> that takes a String containing only the capital letters <tt>A</tt>, <tt>C</tt>, <tt>T</tt>, <tt>G</tt>, (representing DNA), and returns its <i>Watson-Crick complement</i>: replace <tt>A</tt> with <tt>T</tt>, <tt>C</tt> with <tt>G</tt>, and vice-versa. <p>For example, <tt>complementWC("GATTACA")</tt> should return <tt>"CTAATGT"</tt>. (You may assume the input is valid, there is no need to check for non-DNA characters.) <p> We encourage you to review the <a href="http://introcs.cs.princeton.edu/java/11cheatsheet/#String"> abbreviated String API</a> on the introcs cheatsheet. If you do this, you can solve this problem without using any loops.
Epilogue html markup shown when solved	remove
Public permissions	remove
Remarks Comments, history, license, etc.	remove
Engine
Choices json list of string, bool pairs e.g. `[["good", true], ["bad", false]]`
Correct answer
Template / Reference solution	public static String complementWC(String dna) { // replace all 'C's with 'G's and vice-versa \[ String tmp = dna.replaceAll("C", "X"); tmp = tmp.replaceAll("G", "C"); tmp = tmp.replaceAll("X", "G"); ]\ // replace all 'A's with 'T's and vice-versa \[ tmp = tmp.replaceAll("A", "X"); tmp = tmp.replaceAll("T", "A"); tmp = tmp.replaceAll("X", "T"); ]\ return \[tmp;]\ }
Template / Reference solution
Java test suite See manual	test("complementWC", "GATTACA"); test("complementWC", "CAT"); test("complementWC", "TAGACAT"); test("complementWC", "GCGAGTGAGC"); test("complementWC", "");
C++ test suite json list of stdin/args tests e.g. `[{"stdin":"hi", "args":["4", "5"]}, {"stdin":"noargs"}]` to just run once with no input use `[{}]`
C++ test suite See manual
Forbidden substrings json list of strings e.g. `["for","while"]`	remove
Solution visibility	remove
Java imports json list of importables e.g. `["java.util.*"]`	remove
Override Java classname else defaults to websheet name	remove
Dependent on other websheets? json list of websheet names in this folder e.g. `["DataStructure"]`	remove
Is example? i.e., just a demo	remove
Add compiler flag(s) json list of flags e.g. `["-Wno-unused-variable"]`	remove
Remove default compiler flag(s) json list of flags see default_cppflags e.g. `["-Wno-write-strings"]`	remove

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