add: layer backward done

1 files changed, 15 insertions, 7 deletions

diff --git a/src/nn.h b/src/nn.h
index d6dd1fe..94772c2 100644
--- a/src/nn.h
+++ b/src/nn.h
@@ -26,19 +26,27 @@ void nn_layer_map_activation(
 
 void nn_layer_forward(Layer layer, double *out, size_t out_shape[2], double *input, size_t input_shape[2]);
 void nn_layer_backward(
-        Layer layer,
-        double *weights,
-        double *cost_derivative, size_t dcost_shape[2],
-        double *out, size_t out_shape[2],
-        double *labels, size_t labels_shape[2],
-        double *local_gradient); //TODO
+        double *weights, size_t weigths_shape[2],
+        double *delta, size_t dcost_cols,
+        double *out_prev, size_t out_cols,
+        Layer layer, double alpha);
 
 double sigmoid(double x);
 double relu(double x);
 double identity(double x);
 
 
-void nn_forward(double **aout, double **zout, double *input, size_t input_shape[2], Layer network[], size_t network_size);
+void nn_forward(
+        double **aout, double **zout,
+        double *input, size_t input_shape[2],
+        Layer network[], size_t network_size);
+
+void nn_backwad(
+        double **weights,
+        double **zout, double **outs, size_t n_rows,
+        Layer network[], size_t network_size,
+        double (cost_derivative)(double, double));
+
 void nn_layer_out_delta(
         double *delta, size_t delta_cols,
         double *error, size_t error_cols,