refresh

du5/snake.c

@@ -22,22 +22,22 @@ struct snake* add_snake (struct snake* snake, int x, int y) {
 }
 
 struct snake* remove_snake(struct snake* snake) {
-    if(snake == NULL || snake-> next == NULL) {
+    if (snake == NULL) {
+        return NULL;
+    }
+
+    if (snake->next == NULL) {
         free(snake);
         return NULL;
     }
 
-    struct snake* previous = NULL;
-    struct snake* current = NULL;
-    while (current->next !=NULL) {
-        previous = current;
-        current = current->next;
+    struct snake* temp = snake;
+    while (temp->next->next != NULL) {
+        temp = temp->next;
     }
 
-    if (previous !=NULL) {
-        free(current->next);
-        previous->next = NULL;
-    }
+    free(temp->next);
+    temp->next = NULL;
 
     return snake;
 }