From e8a8b7e9dd0c27e4582e66df0ed79eb6949e0067 Mon Sep 17 00:00:00 2001
From: Talia <thannani1@hwemail.com>
Date: Mon, 15 Sep 2025 12:45:26 -0700
Subject: [PATCH] attempted to fix bugs and created tester class

Made a new tester with the main method from  matrixexample.
---
 MatrixExample.java | 32 ++++----------------------------
 MatrixTester.java  | 29 +++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 28 deletions(-)
 create mode 100644 MatrixTester.java

diff --git a/MatrixExample.java b/MatrixExample.java
index 051e5bc..f93a0b2 100644
--- a/MatrixExample.java
+++ b/MatrixExample.java
@@ -1,38 +1,15 @@
 import java.util.Random;
 
 public class MatrixExample {
-    public static void main(String[] args) {
-        int[][] matrix = {
-                { 1, 2, 3, 4, 5, 6 },
-                { 4, 5, 6, 3, 7, 2 },
-                { 27, 8, 9, 5, 3, 21 },
-                { 73, 2, 19, 5, 1, 8 },
-                { 47, 9, 9, 5, 0, 22 },
-                { 78, 86, 1, 4, 1, 21 },
-                { 73, 18, 2, 2, 5, 11 }
-        };
 
-        int numRows = 6;
-        int numCols = 7;
-
-        int[][] matrix2 = generateRandomMatrix(numRows, numCols);
-        int[][] result = multiplyMatrices(matrix, matrix2);
-
-        System.out.println("result length: " + result.length + " x " + result[0].length);
-        for (int i = 0; i < result.length; i++) {
-            for (int j = 0; j < result[i].length; i++) {
-                System.out.print(result[i][j] + " ");
-            }
-            System.out.println();
-        }
-
-    }
 
     public static int[][] multiplyMatrices(int[][] matrix1, int[][] matrix2) {
         int rows1 = matrix1.length;
         int cols1 = matrix1[0].length;
         int rows2 = matrix2.length;
         int cols2 = matrix2[0].length;
+        
+        
 
         if (cols1 != rows2) {
             throw new IllegalArgumentException(
@@ -40,17 +17,16 @@ public static int[][] multiplyMatrices(int[][] matrix1, int[][] matrix2) {
         }
 
         // Some more issues here too
-        int[][] result = new int[rows1+1][cols2+1];
+        int[][] result = new int[rows1][cols2-1];
 
         // Lots of issues with this code, it used to be working perfectly though
         for (int i = 0; i < rows1; i++) {
             for (int j = 0; j < cols2; j++) {
                 for (int k = 0; k < cols1; k++) {
-                    result[j][k] += matrix1[i][j] * matrix2[k][j];
+                    result[i][j] += matrix1[i][k] * matrix2[k][j];
                 }
             }
         }
-
         return result;
     }
 
diff --git a/MatrixTester.java b/MatrixTester.java
new file mode 100644
index 0000000..39a5f91
--- /dev/null
+++ b/MatrixTester.java
@@ -0,0 +1,29 @@
+public class MatrixTester {
+    public static void main(String[] args) {
+                int[][] matrix = {
+                { 1, 2, 3, 4, 5, 6 },
+                { 4, 5, 6, 3, 7, 2 },
+                { 27, 8, 9, 5, 3, 21 },
+                { 73, 2, 19, 5, 1, 8 },
+                { 47, 9, 9, 5, 0, 22 },
+                { 78, 86, 1, 4, 1, 21 },
+                { 73, 18, 2, 2, 5, 11 }
+        };
+
+        int numRows = 7;
+        int numCols = 6;
+
+        int[][] matrix2 = MatrixExample.generateRandomMatrix(numCols, numRows);
+        int[][] result = MatrixExample.multiplyMatrices(matrix, matrix2);
+
+        System.out.println("result length: " + result.length + " x " + result[0].length);
+        for (int i = 0; i < result.length; i++) {
+            for (int j = 0; j < result[i].length; j++) {
+                System.out.print(result[i][j] + " ");
+            }
+            System.out.println();
+        }
+
+    }
+    
+}