CountX - Recursive

Given a string, compute recursively (no loops) the number of lowercase 'x' chars in the string. countX("xxhixx") → 4 countX("xhixhix") → 3 countX("hi") → 0

Hisoka's Jutsu :

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public int countX(String str) { if (str.length() == 0) return 0; if(str.charAt(str.length()-1) == 'x') return 1+countX(str.substring(0, str.length()-1)); return countX(str.substring(0, str.length()-1)); }

Output :

Ooowh... btw... if we want to write countX in C#, it will gonna be like this :

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public static int countX(String str) { //stop condition if (str.Length == 0) return 0; if (str[(str.Length - 1)] == 'x') return 1 + countX(str.Substring(0, str.Length - 1)); return countX(str.Substring(0, str.Length - 1)); }

The output is same, you can check it here 

Add Unitest to C# Console Project

Pertama-tama silahkan buat project console baru...Setelah selese, klik kanan dibagian solution projectnya seperti terlihat di bawah :

Setelah selese ngebuat project unitestnya... Klik kanan di project unit test itu... terus pilih "Add - Reference "

Terus pilih tab "Solution" terus centang project utama kita kyk gini :

Naaah...dibagian reference tar kliatan :

Sampe sini kita udah bisa masukin assert2 dkk... :D
Kyk gini :

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using System; using Microsoft.VisualStudio.TestTools.UnitTesting; namespace UnitTestCodingBat { [TestClass] public class UnitTest1 { [TestMethod] public void TestMethod1() { Assert.AreEqual(3, Codingbat_csharp.Program.powerN(3, 1)); } [TestMethod] public void TestMethod2() { Assert.AreEqual(1000, Codingbat_csharp.Program.powerN(10, 3)); } [TestMethod] public void TestMethod3() { Assert.AreEqual(32, Codingbat_csharp.Program.powerN(2, 5)); } } }

Klu kita run :

Hasilnya :

Yeeeei... sekiaan...semoga bermanfaat.. :)