diff --git a/part1_iot_framework/lab3-2-2_working_with_c/main/main.c b/part1_iot_framework/lab3-2-2_working_with_c/main/main.c
index 1ec321f..adbd792 100644
--- a/part1_iot_framework/lab3-2-2_working_with_c/main/main.c
+++ b/part1_iot_framework/lab3-2-2_working_with_c/main/main.c
@@ -45,8 +45,6 @@ typedef struct SensorSetStruct
 { 
   Sensor temperature;
   Sensor pressure;
-  void (* Update)(struct  SensorSetStruct *sensorSet);
-  void (* Display)(struct  SensorSetStruct *sensorSet);
 } SensorSet;
 
 /**
@@ -55,6 +53,7 @@ typedef struct SensorSetStruct
  * @param sensorSet
  */
 void defaultUpdateSensorValues(struct SensorSetStruct *sensorSet) {
+
   int random = abs(esp_random());
   sensorSet->temperature.value.f = (random % 400) / 10;
   random = abs(esp_random());
@@ -76,9 +75,9 @@ void defaultPrintSensorValues(struct SensorSetStruct *sensorSet) {
  * 
  * @param sensorSet 
  */
-void updateAndDisplaySensorValues(struct  SensorSetStruct *sensorSet) {
-  sensorSet->Update(sensorSet);
-  sensorSet->Display(sensorSet);
+void updateAndDisplaySensorValues(struct  SensorSetStruct *sensorSet ,void (* Update)(struct  SensorSetStruct *sensorSet),void (* Display)(struct  SensorSetStruct *sensorSet)) {
+  Update(sensorSet);
+  Display(sensorSet);
 }
 
 
@@ -89,13 +88,11 @@ void updateAndDisplaySensorValues(struct  SensorSetStruct *sensorSet) {
 
 void app_main(void) {
 
-
-
   /* TODO:
      Declare and init sensorSet variable (structure is SensorSetStruct)
 	 Tip: Use designated initializer
   */
- static struct SensorSetStruct houlou = {
+ struct SensorSetStruct houlou = {
   .temperature=
   {
     .name="TEMP", 
@@ -107,15 +104,14 @@ void app_main(void) {
     .name="PRES", 
     .type=INT, 
     .value={.i=0}
-  },
-  .Update= defaultUpdateSensorValues,
-  .Display= defaultPrintSensorValues
+  }
  };
 
+
   while (1) {
     // Wait for 1 sec.
     usleep(1000000);
-    updateAndDisplaySensorValues(&houlou);
+    updateAndDisplaySensorValues(&houlou,defaultUpdateSensorValues,defaultPrintSensorValues);
     
     /*printf ("\n%d\n", sizeof (int));
     printf ("\n%d\n", sizeof (float));