Finished StringCheck Method but did not test yet

imageInput.c

@@ -8,6 +8,27 @@
 
 // TODO Implementieren Sie geeignete Hilfsfunktionen für das Lesen der Bildserie aus einer Datei
 
+int checkString (FILE *file){ //Checks if String at the start of File equals expected Format (0 for wrong 1 for right)
+	if (file == NULL){ //returns 0 for empty file
+		return 0;
+		}
+	char expectedString[] = FILE_HEADER_STRING;
+	char actualString[BUFFER_SIZE];
+
+	rewind(file);
+	size_t bytesRead = fread(actualString, 1,27 , file); //Stores Bytes of start of File to actualString
+	if (bytesRead != 27){
+	return 0;} //Returns 0 if File is to short
+	actualString[27] = '\0';
+
+	if (strcmp(actualString, expectedString) != 0){
+	return 0;
+}
+	else{
+	return 1;
+}
+}
+
 // TODO Vervollständigen Sie die Funktion readImages unter Benutzung Ihrer Hilfsfunktionen
 GrayScaleImageSeries *readImages(const char *path)
 {
@@ -19,11 +40,4 @@ GrayScaleImageSeries *readImages(const char *path)
 // TODO Vervollständigen Sie die Funktion clearSeries, welche eine Bildserie vollständig aus dem Speicher freigibt
 void clearSeries(GrayScaleImageSeries *series)
 {
-	for(size_t i = GrayScaleImageSeries.count - 1; i >= 0; i--)
-	{
-		free(GrayScaleImageSeries.images+GrayScaleImageSeries.count*sizeof(GrayScaleImage)*i);
-		free(GrayScaleImageSeries.labels+GrayScaleImageSeries.count*sizeof(unsigned char)*i);
-	}
-	GrayScaleImageSeries.images = NULL;
-	GrayScaleImageSeries.labels = NULL;
 }

matrix.c

@@ -1,6 +1,5 @@
 #include <stdlib.h>
 #include <string.h>
-#include <stdio.h>
 #include "matrix.h"
 
 // TODO Matrix-Funktionen implementieren
@@ -17,14 +16,14 @@ Matrix createMatrix(unsigned int rows, unsigned int cols)
     Matrix newMatrix;
 	newMatrix.rows = rows;
 	newMatrix.cols = cols;
-	newMatrix.buffer = calloc(rows*cols, sizeof(MatrixType));
+	newMatrix.buffer = calloc(rows*cols, sizeof(MatrixType))
 	return newMatrix;
 }
 
 void clearMatrix(Matrix *matrix)
 {
-    free(matrix->buffer);
+    free(*matrix.buffer);
-	matrix->buffer = NULL;
+	*matrix.buffer = NULL;
 }
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
@@ -55,7 +54,7 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
     Matrix MatrixErgebnis = createMatrix(matrix1.rows, matrix1.cols); //Creating Result Matrix
     if(matrix1.cols != matrix2.cols || matrix1.rows != matrix2.rows){
         printf("Matrix dimensions do not match\n"); //Error Message if dimensions of Input Matrixes are not identical
-        clearMatrix(&MatrixErgebnis);
+        MatrixErgebnis = clearMatrix(MatrixErgebnis);
         return MatrixErgebnis;
     }
     else{
@@ -75,25 +74,4 @@ return MatrixErgebnis;
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
     
-    Matrix result;
-    result.rows = matrix1.rows;
-    result.cols = matrix2.cols;
-
-    if (matrix1.rows == matrix2.cols) {
-
-        result.buffer = malloc(result.rows * result.cols * sizeof(MatrixType));
-
-        for(int i = 0; i < result.rows; i++) {
-            for(int j = 0; j < result.cols; j++) {
-                MatrixType value = 0;
-                for(int k = 0; k < matrix1.cols; k++) {
-                    value += matrix1.buffer[i * matrix1.cols + k] * matrix2.buffer[k * matrix2.cols + j];
-                }
-                result.buffer[i * matrix1.cols + j] = value;
-            }
-        }
-        return result;
-    }
-    printf("Die angegebenen Matrizen haben keine passenden Dimensionen für die Multiplikation");
-    return result;
 }

matrix.h

@@ -7,7 +7,7 @@ typedef float MatrixType;
 
 // TODO Matrixtyp definieren
 
-typedef struct Matrix Matrix;
+typedef struct Matrix;