diff --git a/Makefile b/Makefile
index ea7ec8e..82c0aaf 100644
--- a/Makefile
+++ b/Makefile
@@ -1 +1,6 @@
-default : executable
+send :
+	git add .
+	git commit
+	git push
+
+
diff --git a/exe b/exe
new file mode 100755
index 0000000..8a3772d
Binary files /dev/null and b/exe differ
diff --git a/main.c b/main.c
index 00e4e26..6d6fab7 100644
--- a/main.c
+++ b/main.c
@@ -1,11 +1,19 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "randomness.h"
 #include "neurons.h"
 #include "network.h"
 
 int main(int argc, char *argv[])
 {
+    init_randomness();
+
     printf("Bonjour et bienvenu ;)\n");
+    int i;
+    for(i=1 ; i<= 30 ; i++)
+    {
+        printf("%dth generated fload = %f\n", i, random_float(0.0 , 1.0));
+    }
     return 0;
 }
\ No newline at end of file
diff --git a/network.c b/network.c
index 7aef52c..aebd110 100644
--- a/network.c
+++ b/network.c
@@ -1,10 +1,19 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "randomness.h"
 #include "neurons.h"
 #include "network.h"
 
 Neuron *generate_layer(int n_neurons, int n_neurons_prev_layer)
 {
 
+}
+
+Network *init_network(int n_neurons_per_layer[])
+{
+    /* initialize the network based on array n_neurons_per_layer :
+    - size of n_neurons_per_layer is the number of layers
+    - each ith number in array n_neurons_per_layer is the number of neurons in ith layer
+    */
 }
\ No newline at end of file
diff --git a/network.h b/network.h
index 4111437..31c78f6 100644
--- a/network.h
+++ b/network.h
@@ -9,5 +9,7 @@ struct network
     int number_layers; //keeps track of layers' number
 };
 
+Neuron *generate_layer(int n_neurons, int n_neurons_prev_layer);
+Network *init_network(int n_neurons_per_layer[]);
 
 #endif
\ No newline at end of file
diff --git a/neurons.c b/neurons.c
index c0a4f7a..e16ba86 100644
--- a/neurons.c
+++ b/neurons.c
@@ -1,19 +1,37 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include "randomness.h"
 #include "neurons.h"
 
 Neuron *init_neuron(int n_weights)
 {
     Neuron *neuron = (Neuron*)malloc(sizeof(Neuron));
-    neuron->weights = (float*)malloc(n_weights*sizeof(float));
+    if(n_weights == 0)
+    {
+        neuron->weights = NULL;
+    }else
+    {
+        neuron->weights = (float*)malloc(n_weights*sizeof(float));
+        int i;
+        for(i=1 ; i<=n_weights ; i++)
+        {
+            neuron->weights[i] = random_float(0.0 , 1.0);
+        }
+    }
+    neuron->bias = random_float(0.0 , 1.0);
     neuron->output = 0.0;
     neuron->delta_error = 0.0;
     neuron->same_layer_next_neuron = NULL;
+
+    return neuron;
 }
 
 void destroy_neuron(Neuron *neuron)
 {
-    free(neuron->weights);
+    if(neuron->weights != NULL)
+    {
+        free(neuron->weights);
+    }
     free(neuron);
 }
\ No newline at end of file
diff --git a/neurons.h b/neurons.h
index 83668f4..3fe3200 100644
--- a/neurons.h
+++ b/neurons.h
@@ -4,7 +4,8 @@
 typedef struct neuron Neuron;
 struct neuron
 {
-    float *weights; //weights associated to the neuron + neuron's bias
+    float *weights; //weights associated to the neuron
+    float bias; //neuron's bias
     float output; //output of the neuron
     float delta_error; //the delta error for updating current weights
     Neuron *same_layer_next_neuron;
diff --git a/randomness.c b/randomness.c
new file mode 100644
index 0000000..9366c79
--- /dev/null
+++ b/randomness.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include "randomness.h"
+
+void init_randomness(void) //to be called only one time in main function
+{
+    srand(time(NULL));
+}
+
+float random_float(float min, float max)
+{
+    //generate a random float number in [min ; max] inclusive
+    return min + ((float)rand()/(float)RAND_MAX) * (max-min);
+}
\ No newline at end of file
diff --git a/randomness.h b/randomness.h
new file mode 100644
index 0000000..c3e1839
--- /dev/null
+++ b/randomness.h
@@ -0,0 +1,7 @@
+#ifndef RANDOMNESS_H
+#define RANDOMNESS_H
+
+void init_randomness(void);
+float random_float(float min, float max);
+
+#endif
\ No newline at end of file