(0.4.1): Fixed + Added Tester

MatrixExample.java

@@ -1,32 +1,6 @@
 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;
@@ -39,14 +13,12 @@ public static int[][] multiplyMatrices(int[][] matrix1, int[][] matrix2) {
                     "Number of columns in the first matrix must be equal to the number of rows in the second matrix.");
         }
 
-        // Some more issues here too
-        int[][] result = new int[rows1+1][cols2+1];
+        int[][] result = new int[rows1][cols2];
 
-        // 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];
+                for (int k = 0; k < rows2; k++) {
+                    result[i][j] += matrix1[i][k] * matrix2[k][j];
                 }
             }
         }

MatrixTester.java

@@ -0,0 +1,27 @@
+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 = 6;
+    int numCols = 7;
+
+    int[][] matrix2 = MatrixExample.generateRandomMatrix(numRows, numCols);
+    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();
+    }
+    }
+}