From 0f8a7c84fb92caf54fb93eb14acd8f7ed294dc80 Mon Sep 17 00:00:00 2001
From: Ayden Bourdeau <ayden.bourdeau@ecamion.com>
Date: Fri, 1 Nov 2024 14:43:59 -0400
Subject: [PATCH] Fixed Dividing by Zero errors; adding illegalException for
 all methods to throw exception if divisor is 0

---
 .../algorithms/mathematics/Division.java      | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/com/jwetherell/algorithms/mathematics/Division.java b/src/com/jwetherell/algorithms/mathematics/Division.java
index c133f741..e485369e 100644
--- a/src/com/jwetherell/algorithms/mathematics/Division.java
+++ b/src/com/jwetherell/algorithms/mathematics/Division.java
@@ -3,6 +3,11 @@
 public class Division {
 
     public static final long division(int a, int b) {
+        
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         long result = ((long) a) / ((long) b);
         return result;
     }
@@ -11,6 +16,10 @@ public static final long divisionUsingLoop(int a, int b) {
         int absA = Math.abs(a);
         int absB = Math.abs(b);
 
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         long temp = absA;
         long result = 0;
         while (temp >= 0) {
@@ -25,6 +34,10 @@ public static final long divisionUsingRecursion(int a, int b) {
         int absA = Math.abs(a);
         int absB = Math.abs(b);
 
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         long result = 1;
         int diff = absA - absB;
         if (diff > 0 && diff <= 1) {
@@ -41,6 +54,10 @@ public static final long divisionUsingMultiplication(int a, int b) {
         int absA = Math.abs(a);
         int absB = Math.abs(b);
 
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         int temp = absB;
         int counter = 0;
         while (temp <= absA) {
@@ -59,6 +76,10 @@ public static final long divisionUsingShift(int a, int b) {
         int absB = Math.abs(b);
         int tempA, tempB, counter;
 
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         long result = 0L;
         while (absA >= absB) {
             tempA = absA >> 1; // Right shift "a"
@@ -78,6 +99,11 @@ public static final long divisionUsingShift(int a, int b) {
     public static final long divisionUsingLogs(int a, int b) {
         long absA = Math.abs(a);
         long absB = Math.abs(b);
+
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+        
         double logBase10A = Math.log10(absA);
         double logBase10B = Math.log10(absB);
         double powOf10 = Math.pow(10, (logBase10A - logBase10B));