diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index c13e44e..c39cd37 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -18,7 +18,16 @@
     <inspection_tool class="PyArgumentEqualDefaultInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="PyAugmentAssignmentInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="PyClassicStyleClassInspection" enabled="true" level="WARNING" enabled_by_default="true" />
-    <inspection_tool class="PyCompatibilityInspection" enabled="true" level="WARNING" enabled_by_default="true" />
+    <inspection_tool class="PyCompatibilityInspection" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="ourVersions">
+        <value>
+          <list size="2">
+            <item index="0" class="java.lang.String" itemvalue="2.7" />
+            <item index="1" class="java.lang.String" itemvalue="3.13" />
+          </list>
+        </value>
+      </option>
+    </inspection_tool>
     <inspection_tool class="PyMandatoryEncodingInspection" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="PyMissingOrEmptyDocstringInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
     <inspection_tool class="PyMissingTypeHintsInspection" enabled="true" level="WEAK WARNING" enabled_by_default="true" />
diff --git a/src/db.c b/src/db.c
index c670b3f..da2725a 100644
--- a/src/db.c
+++ b/src/db.c
@@ -13,99 +13,91 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <time.h>
+#include <string.h>
 #include "planner.h"
-#include "list.h"
+#include "llist.h"
 
 /*
 write a complete linkedlist to a task csv file.
  */
-void write_linkedlist_to_csv(llist* head, const char* filename) {
-	//Open file with write permision
-	FILE* file = fopen(filename, "w");
-	//if there is no file or a wrong file path you becom an error
-	if (file == NULL) {
-    	perror("Could not open file %s\n", filename);
-  	}
-  	else{
-    	//write the file header
-    	fprintf(file, "TaskName, Created, Deadline, Priority, Spare\n");
+void write_linkedlist_to_csv(llist *head, const char *filename) {
+    //Open file with write permission
+    FILE *file = fopen(filename, "w");
+    //if there is no file or a wrong file path you become an error
+    if (file == NULL) {
+        perror("Could not open file\n");
+    }
 
-    	// Iterate through the linked list and write the data to the CSV
-  		llist* current = head;
-  		while (current != NULL) {
+    //write the file header
+    fprintf(file, "TaskName, Created, Deadline, Priority, Spare\n");
 
-    		// Write the task data to the CSV file
-    		fprintf(file, "%s, %lu, %lu, %d, %lu\n",
-            	task->name,
-            	task->created,
-            	task->deadline,
-            	task->priority,
-            	task->spare,
+    // Iterate through the linked list and write the data to the CSV
+    llist *current = head;
+    while (current != NULL) {
+        // Write the task data to the CSV file
+        Task *task = (Task *) (current->data);
+        fprintf(file, "%s, %lu, %lu, %d, %lu\n",
+                task->name,
+                task->created,
+                task->deadline,
+                task->priority,
+                task->spare);
 
 
-    		current = current->next;
-  		}
-	fclose(file); // Close the file
-	}
+        current = current->next;
+    }
+    fclose(file); // Close the file
 }
 
+
 /*
 read a task csv file and write the data in a linked list
  */
 
-void write_csv_to_llist(const char* filename) {
-	//Open file with read permision
-  FILE* file = fopen(filename, "r");
-  if (file == NULL) {
-    perror("Could not open file %s\n", filename);
-  }
-  else{
-	char line[1024]; //Line Buffer
+llist *write_csv_to_llist(const char *filename) {
+    //initialize list
+    llist *list = NULL;
+    //Open file with read permission
+    FILE *file = fopen(filename, "r");
+    if (file == NULL) {
+        perror("Could not open file\n");
+    }
+    char line[1024]; //Line Buffer
     int count = 0; //task counter
-    llist *list = NULL
     fgets(line, sizeof(line), file); //read and ignore file head
     while (fgets(line, sizeof(line), file)) {
-      	count++;
-    	//remove newline sign
+        count++;
+        //remove newline sign
         line[strcspn(line, "\n")] = '\0';
 
         // column slice
-        char *taskname = strtok(line, ",");
-        char *tsakcreation_dateSTR = strtok(NULL, ",");
-        char *tsakdeadline_dateSTR = strtok(NULL, ",");
-        char *tsakprioritySTR = strtok(NULL, ",");
-        char *tsakspareSTR = strtok(NULL, ",");
+        char *task_name = strtok(line, ",");
+        char *task_creation_dateSTR = strtok(NULL, ",");
+        char *task_deadline_dateSTR = strtok(NULL, ",");
+        char *task_prioritySTR = strtok(NULL, ",");
+        char *task_spareSTR = strtok(NULL, ",");
 
 
         // convert char in integer and date
-        unsigned long int taskcreation_date = strtoul(taskcreation_dateSTR,NULL,10);
-        unsigned long int taskdeadline_date = strtoul(taskdeadline_dateSTR,NULL,10);
-        unsigned long int taskspare = strtoul(taskspareSTR,NULL,10);
-        int priority = atoi(prioritySTR);
-
+        unsigned long int task_creation_date = strtoul(task_creation_dateSTR,NULL, 10);
+        unsigned long int task_deadline_date = strtoul(task_deadline_dateSTR,NULL, 10);
+        unsigned long int task_spare = strtoul(task_spareSTR,NULL, 10);
+        int task_priority = (int) strtol(task_prioritySTR, NULL, 10);
 
 
         //create Task
-        Task *task = newTask(taskname, taskcreation_date, taskdeadline_date, taskpriority, taskspare);
-
+        Task *task = newTask(task_name, task_creation_date, task_deadline_date, task_priority, task_spare);
 
 
         // Insert task into the linked list
         if (list == NULL) {
             // If the list is empty, initialize it with the first task
             list = llistNew(task, cmpTaskN);
-        }
-        else {
+        } else {
             // Append the task to the linked list
             llistAppend(list, task);
         }
     }
-
     fclose(file);
-  }
-
-
-
+    return list;
 }
-