diff --git a/makefile b/makefile
index f27b756..5d94684 100644
--- a/makefile
+++ b/makefile
@@ -57,10 +57,12 @@ imageInputTests: imageInput.o imageInputTests.c $(unityfolder)/unity.c
 # --------------------------
 # Clean
 # --------------------------
+#clean:
+#ifeq ($(OS),Windows_NT)
+#	del /f *.o *.exe
+#else
+#	rm -f *.o mnist runMatrixTests runNeuralNetworkTests runImageInputTests
+#endif
+# clean für windows
 clean:
-ifeq ($(OS),Windows_NT)
-	del /f *.o *.exe
-else
-	rm -f *.o mnist runMatrixTests runNeuralNetworkTests runImageInputTests
-endif
-
+	rm -f *.o *.exe 
\ No newline at end of file
diff --git a/matrix.c b/matrix.c
index ac8c915..7a8dcac 100644
--- a/matrix.c
+++ b/matrix.c
@@ -1,42 +1,65 @@
+#include "matrix.h"
 #include <stdlib.h>
 #include <string.h>
-#include "matrix.h"
-
 // TODO Matrix-Funktionen implementieren
-
-Matrix createMatrix(unsigned int rows, unsigned int cols)
-{
-    MatrixType*data= malloc(rows*cols*sizeof(MatrixType));  //Speicher reservieren
-    Matrix newMatrix = {rows,cols,data};
-    return newMatrix;
+/*typedef struct {
+    unsigned int rows;  //Zeilen
+    unsigned int cols; //Spalten
+    MatrixType *buffer; //Zeiger auf Speicherbereich Reihen*Spalten
+} Matrix;*/
+Matrix createMatrix(unsigned int rows, unsigned int cols) {
+  MatrixType *buffer =
+      malloc(rows * cols * sizeof(MatrixType)); // Speicher reservieren, malloc
+                                                // liefert Zeiger auf Speicher
+  Matrix newMatrix = {rows, cols, buffer};      // neue Matrix nach struct
+  return newMatrix;
 }
-
-void clearMatrix(Matrix *matrix)
-{
-    matrix->data = UNDEFINED_MATRIX_VALUE;        //Auf 0 setzen
-    matrix->rows = UNDEFINED_MATRIX_VALUE;
-    matrix->cols = UNDEFINED_MATRIX_VALUE;
-
-    free((*matrix).data); //Speicher freigeben
-    
+void clearMatrix(Matrix *matrix) {
+  matrix->buffer = UNDEFINED_MATRIX_VALUE;
+  matrix->rows = UNDEFINED_MATRIX_VALUE;
+  matrix->cols = UNDEFINED_MATRIX_VALUE;
+  free((*matrix).buffer); // Speicher freigeben
 }
+void setMatrixAt(const MatrixType value, Matrix matrix,
+                 const unsigned int rowIdx, // Kopie der Matrix wird übergeben
+                 const unsigned int colIdx) {
 
-void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
-{
-    
+  matrix.buffer[rowIdx * matrix.cols + colIdx] =
+      value; // rowIdx * matrix.cols -> Beginn der Zeile colIdx ->Spalte
+             // innerhalb der Zeile
 }
+MatrixType getMatrixAt(const Matrix matrix,
+                       unsigned int rowIdx, // Kopie der Matrix wird übergeben
+                       unsigned int colIdx) {
+  if (rowIdx >= matrix.rows ||
+      colIdx >= matrix.cols) { // Speichergröße nicht überschreiten
+    return 0;
+  }
 
-MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
-{
-    
+  MatrixType value = matrix.buffer[rowIdx * matrix.cols + colIdx];
+
+  return value;
 }
+Matrix add(const Matrix matrix1, const Matrix matrix2) {
 
-Matrix add(const Matrix matrix1, const Matrix matrix2)
-{
-    
+  // Ergebnismatrix
+  Matrix result;
+
+  // Broadcasting nur bei Vektor und Matrix, Fehlermeldung bei zwei unpassender
+  // Matrix
+  if (matrix1.rows != matrix2.rows) {
+
+    // check, which one is smaller
+    // realloc
+  }
+
+  if (matrix1.cols != matrix2.cols) {
+  }
+
+  // Speicher reservieren
+
+  // Matrix addieren
+
+  return result;
 }
-
-Matrix multiply(const Matrix matrix1, const Matrix matrix2)
-{
-    
-}
\ No newline at end of file
+Matrix multiply(const Matrix matrix1, const Matrix matrix2) { return matrix1; }
diff --git a/matrix.h b/matrix.h
index 736e6e1..ca871ae 100644
--- a/matrix.h
+++ b/matrix.h
@@ -6,20 +6,20 @@
 typedef float MatrixType;
 
 // TODO Matrixtyp definieren
-typedef struct
-{
-    unsigned int rows;
-    unsigned int cols;
-    MatrixType *data;
-} Matrix;
+typedef struct {
+  unsigned int rows;
+  unsigned int cols;
+  MatrixType *buffer;
 
+} Matrix;
 
 Matrix createMatrix(unsigned int rows, unsigned int cols);
 void clearMatrix(Matrix *matrix);
-void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx);
-MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx);
+void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx,
+                 unsigned int colIdx);
+MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx,
+                       unsigned int colIdx);
 Matrix add(const Matrix matrix1, const Matrix matrix2);
 Matrix multiply(const Matrix matrix1, const Matrix matrix2);
 
-
 #endif