diff --git a/Startcode/matrix.c b/Startcode/matrix.c
index f345e56..21e51c1 100644
--- a/Startcode/matrix.c
+++ b/Startcode/matrix.c
@@ -50,8 +50,43 @@ MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int co
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
-    Matrix testHelp = {NULL, 0,0};
-    return testHelp;
+
+    if(matrix1.rows == matrix2.rows && matrix1.cols == matrix2.cols){
+        Matrix resultMatrix = createMatrix(matrix1.rows,matrix1.cols);
+        for(int i = 0; i < matrix1.rows * matrix1.cols; i++){
+            resultMatrix.buffer[i] = matrix1.buffer[i] + matrix2.buffer[i];
+        }
+        return resultMatrix;
+    }else if(matrix1.rows == matrix2.rows && matrix1.cols == 1){ // Matrix1 ist Vektor
+        Matrix resultMatrix = createMatrix(matrix1.rows,matrix2.cols);
+        for(int i = 0; i < matrix2.cols; i++){
+            for(int j = 0; j < matrix1.rows; j++){
+                resultMatrix.buffer[i + j * matrix2.cols]= matrix2.buffer[i + j * matrix2.cols] + matrix1.buffer[j];
+            }
+        }
+        return resultMatrix;
+    }else if(matrix1.rows == matrix2.rows && matrix2.cols == 1){ // Matrix ist Vektor
+        Matrix resultMatrix = createMatrix(matrix1.rows,matrix1.cols);
+        for(int i = 0; i < matrix1.cols; i++){
+            for(int j = 0; j < matrix1.rows; j++){
+                resultMatrix.buffer[i + j * matrix1.cols]= matrix1.buffer[i + j * matrix1.cols] + matrix2.buffer[j];
+            }
+        }
+        return resultMatrix;
+    }else{
+        Matrix emptyMatrix = {NULL,0,0};
+        return emptyMatrix;
+    }
+
+
+
+
+
+
+
+
+
+
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
@@ -76,9 +111,7 @@ Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 
         return resultMatrix;
     }else{
-        resultMatrix.buffer = NULL;
-        resultMatrix.rows = 0;
-        resultMatrix.cols = 0;
+        clearMatrix(&resultMatrix);
         return resultMatrix;
     }