From 367a8acdb20212e7786183840868c9b56cae17f4 Mon Sep 17 00:00:00 2001
From: Matthew Ellison <m_ellison@ymail.com>
Date: Tue, 8 Feb 2022 22:28:42 +0000
Subject: [PATCH] Fixed bugs found during unit testing

---
 .../com/mattrixwv/matrix/IntegerMatrix.java   | 21 ++++++++++++-------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/src/main/java/com/mattrixwv/matrix/IntegerMatrix.java b/src/main/java/com/mattrixwv/matrix/IntegerMatrix.java
index 4c370fe..bf25c59 100644
--- a/src/main/java/com/mattrixwv/matrix/IntegerMatrix.java
+++ b/src/main/java/com/mattrixwv/matrix/IntegerMatrix.java
@@ -1,7 +1,7 @@
 //Matrix/src/main/java/com/mattrixwv/IntegerMatrix.java
 //Mattrixwv
 // Created: 02-01-22
-//Modified: 02-07-22
+//Modified: 02-08-22
 package com.mattrixwv.matrix;
 
 
@@ -167,7 +167,12 @@ public class IntegerMatrix{
 		return new IntegerMatrix(newRow);
 	}
 	public int getNumRows(){
-		return grid.length;
+		if(grid == null){
+			return 0;
+		}
+		else{
+			return grid.length;
+		}
 	}
 	public IntegerMatrix getCol(int col){
 		//Make sure the column number is valid
@@ -693,7 +698,7 @@ public class IntegerMatrix{
 		int[][] newGrid = new int[getNumRows()][getNumCols()];
 		//If the grid is 1x1 return the grid
 		if(getNumRows() == 1){
-			newGrid[0][0] = grid[0][0];
+			newGrid[0][0] = 1;
 		}
 		//Use the formula to find the cofactor matrix
 		else{
@@ -738,7 +743,7 @@ public class IntegerMatrix{
 			IntegerMatrix rightMatrix = (IntegerMatrix)rightSide;
 
 			//Make sure they have the same number of elements
-			if(grid.length != rightMatrix.grid.length){
+			if(getNumRows() != rightMatrix.getNumRows()){
 				return false;
 			}
 			else if(getNumCols() != rightMatrix.getNumCols()){
@@ -746,8 +751,8 @@ public class IntegerMatrix{
 			}
 
 			//Check every element
-			for(int row = 0;row < grid.length;++row){
-				for(int col = 0;col < grid[0].length;++col){
+			for(int row = 0;row < getNumRows();++row){
+				for(int col = 0;col < getNumCols();++col){
 					if(grid[row][col] != rightMatrix.grid[row][col]){
 						return false;
 					}
@@ -773,10 +778,10 @@ public class IntegerMatrix{
 	@Override
 	public String toString(){
 		StringJoiner matrix = new StringJoiner("\n");
-		for(int rowCnt = 0;rowCnt < grid.length;++rowCnt){
+		for(int rowCnt = 0;rowCnt < getNumRows();++rowCnt){
 			StringJoiner row = new StringJoiner(",", "[", "]");
 
-			for(int colCnt = 0;colCnt < grid[0].length;++colCnt){
+			for(int colCnt = 0;colCnt < getNumCols();++colCnt){
 				row.add(Integer.toString(grid[rowCnt][colCnt]));
 			}