matrix mult funktioniert

This reverts commit 13900179a1.

matrix.c

@@ -68,6 +68,7 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
 	Matrix result;
         result.rows = matrix1.rows;
         result.cols = matrix1.cols;
+	//TODO: Chat sagt hier noch buffer calloc rein
 
 
 	//Addition der beiden Matrizen
@@ -85,5 +86,32 @@ Matrix add(const Matrix matrix1, const Matrix matrix2)
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
+	//Spalten matrix 1 muss mit Reihen Matrix 2 übereinstimmen
+	if (matrix1.cols != matrix2.rows)
+	{
+		Matrix result;
+        result.rows = 0;
+        result.cols = 0;
+        result.buffer = NULL;
+        return result;
+	}
 
+	else
+	{
+        Matrix result = createMatrix(matrix1.rows, matrix2.cols);
+        for (unsigned int i = 0; i < result.rows; i++)
+        {
+            for (unsigned int j = 0; j < result.cols; j++)
+            {
+                MatrixType summe = 0;
+                for (unsigned int k = 0; k < matrix1.cols; k++)
+                {
+                    summe += getMatrixAt(matrix1, i, k) * getMatrixAt(matrix2, k, j);
+                }
+                setMatrixAt(summe, result, i, j);
+            }
+        }
+        return result;
+
+	}
 }