Working?

src/softmax_layer.c

@@ -0,0 +1,35 @@
+#include "softmax_layer.h"
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+softmax_layer *make_softmax_layer(int inputs)
+{
+    printf("Softmax Layer: %d inputs\n", inputs);
+    softmax_layer *layer = calloc(1, sizeof(softmax_layer));
+    layer->inputs = inputs;
+    layer->output = calloc(inputs, sizeof(double));
+    layer->delta = calloc(inputs, sizeof(double));
+    return layer;
+}
+
+void forward_softmax_layer(const softmax_layer layer, double *input)
+{
+    int i;
+    double sum = 0;
+    for(i = 0; i < layer.inputs; ++i){
+        sum += exp(input[i]);
+    }
+    for(i = 0; i < layer.inputs; ++i){
+        layer.output[i] = exp(input[i])/sum;
+    }
+}
+
+void backward_softmax_layer(const softmax_layer layer, double *input, double *delta)
+{
+    int i;
+    for(i = 0; i < layer.inputs; ++i){
+        delta[i] = layer.delta[i];
+    }
+}
+