From 19910ab17f669f04f9134939d84b63fd32d28fc9 Mon Sep 17 00:00:00 2001
From: = <markus.kob@outlook.com>
Date: Thu, 20 Nov 2025 14:42:57 +0100
Subject: [PATCH] Added addition and multiplication to new version, still no
 functionality with accessing the matrix information

---
 matrix.c | 33 +++++++++++++++++++++++++++++++--
 matrix.h |  4 ++--
 2 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/matrix.c b/matrix.c
index c8eb6aa..ec22def 100644
--- a/matrix.c
+++ b/matrix.c
@@ -87,10 +87,39 @@ MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int co
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
-    
+    //check if the matrices are able to be added (same size)
+    if (matrix1.cols == matrix2.cols && matrix1.rows == matrix2.rows){
+        //size of the matrices should be the same, if the addition is supposed to happen
+        Matrix outputMatrix = createMatrix(matrix1.rows, matrix1.cols);
+        for (int i = 0; i < matrix1.rows;i++) {
+            for (int j = 0; j < matrix1.cols; j++) {
+                // I dont exactly know how the input for the matrix is set, so this is only the explanation on how to do the math
+                // outputMatrix.buffer[i][j] = matrix1.buffer[i][j] + matrix2.buffer[i][j];
+            }
+        }
+    } else {
+        //no matrix could be added, consequence should be defined
+        // return NULL;
+    }
+
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
-    
+    //check, if the matrices can be multiplied
+    if (matrix1.rows == matrix2.cols) {
+        Matrix outputMatrix = createMatrix(matrix1.rows, matrix2.cols);
+        for(int i = 0; i < matrix1.rows; i++) {
+            for (int j = 0; j < matrix2.cols; j++) {
+                for (int k = 0; k < matrix2.rows; k++) {
+                    // I dont exactly know how the input for the matrix is set, so this is only the explanation on how to do the math
+                    // outputMatrix.buffer[i][j] = matrix1.buffer[i][k] * matrix2[k][j];
+                }
+            }
+        }
+        return outputMatrix;
+    } else {
+        //no matrix could be added, consequence should be defined
+        // return NULL;
+    }
 }
\ No newline at end of file
diff --git a/matrix.h b/matrix.h
index e89fdc7..8f05f79 100644
--- a/matrix.h
+++ b/matrix.h
@@ -7,8 +7,8 @@ typedef float MatrixType;
 // TODO Matrixtyp definieren
 
 typedef struct Matrix {
-    size_t rows;
-    size_t cols;
+    size_t rows; //X-Element
+    size_t cols; //Y-Element
     MatrixType *buffer;
 } Matrix;