clear

cv5/a_train.c

@@ -67,21 +67,27 @@ struct car* clear_train(struct car* first, const char* target) {
         int x = strcmp(this->value, target);
         if(x == 0){ 
             struct car* tmp = first;
-            struct car* prev = NULL;
+            struct car* prev = first;
             if(first == this){
                 first = this->next;
                 free(this);
                 return first;
             }
-            else {
+            if(first->next == this){
                 while(tmp->next != NULL){
                     prev = tmp;
                     tmp = tmp->next;
                 }
+                if(tmp == first){
+                    first = NULL;
+                }
+                else{
+                    prev->next = NULL;            
+                } 
                 free(tmp);   
-                prev->next = NULL;  
+           }
-                return this;          
+
-            }
+
         }
         this = this->next;
    }