get_matrix Funktion erstellt

matrix.c

@@ -22,7 +22,7 @@ void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+    return matrix.data[(rowIdx * matrix.cols) + colIdx];
 }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)