From 33ab7ceb3547d12539c54295818741d800a513f2 Mon Sep 17 00:00:00 2001
From: CjohnsonEDM <cjohnson@editable.com>
Date: Fri, 1 Nov 2024 14:44:14 -0400
Subject: [PATCH] I added error handling for division by zero

---
 .../algorithms/mathematics/Division.java      | 34 +++++++++++++++----
 1 file changed, 28 insertions(+), 6 deletions(-)

diff --git a/src/com/jwetherell/algorithms/mathematics/Division.java b/src/com/jwetherell/algorithms/mathematics/Division.java
index c133f741..813637f5 100644
--- a/src/com/jwetherell/algorithms/mathematics/Division.java
+++ b/src/com/jwetherell/algorithms/mathematics/Division.java
@@ -3,11 +3,18 @@
 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;
     }
 
     public static final long divisionUsingLoop(int a, int b) {
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         int absA = Math.abs(a);
         int absB = Math.abs(b);
 
@@ -22,6 +29,10 @@ public static final long divisionUsingLoop(int a, int b) {
     }
 
     public static final long divisionUsingRecursion(int a, int b) {
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         int absA = Math.abs(a);
         int absB = Math.abs(b);
 
@@ -38,6 +49,10 @@ public static final long divisionUsingRecursion(int a, int b) {
     }
 
     public static final long divisionUsingMultiplication(int a, int b) {
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         int absA = Math.abs(a);
         int absB = Math.abs(b);
 
@@ -55,27 +70,34 @@ public static final long divisionUsingMultiplication(int a, int b) {
     }
 
     public static final long divisionUsingShift(int a, int b) {
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         int absA = Math.abs(a);
         int absB = Math.abs(b);
         int tempA, tempB, counter;
 
         long result = 0L;
         while (absA >= absB) {
-            tempA = absA >> 1; // Right shift "a"
+            tempA = absA >> 1;
             tempB = absB;
             counter = 1;
-            while (tempA >= tempB) { // Double "tempB" until it's larger than
-                                     // "tempA"
+            while (tempA >= tempB) {
                 tempB <<= 1;
-                counter <<= 1; // Double the counter
+                counter <<= 1;
             }
-            absA -= tempB; // Subtract "tempB" from "a"
-            result += counter; // Add counter (2^number of left shifts)
+            absA -= tempB;
+            result += counter;
         }
         return (a > 0 && b > 0 || a < 0 && b < 0) ? result : -result;
     }
 
     public static final long divisionUsingLogs(int a, int b) {
+        if (b == 0) {
+            throw new IllegalArgumentException("Divisor cannot be zero.");
+        }
+
         long absA = Math.abs(a);
         long absB = Math.abs(b);
         double logBase10A = Math.log10(absA);