Plugging the memory leak

du4/a_train.c

@@ -68,11 +68,16 @@ struct car* clear_train(struct car* first, const char* target) {
         prev = temp;
         temp = temp->next;
         if(strcmp(temp->value, target) == 0){
-         struct car* next = temp->next;
-        prev->next = next;
-        temp = next;
+         struct car* targetNode = temp;
+        prev->next = temp->next;
+        temp = temp->next;
+        free(targetNode);
 
     }
+    else{
+        prev = temp;
+        temp = temp->next;
+    }
     
     }