clear

cv5/a_train.c

@@ -62,24 +62,25 @@ struct car* clear_train(struct car* first, const char* target) {
             return first;
         }
     }
-    struct car* this = first;
+    struct car* prev = first;
-    while(this->next != NULL){
+    while(prev->next->next != NULL){
-        int x = strcmp(this->value, target);
+        int x = strcmp(prev->value, target);
         if(x == 0){
-            struct car* third = this->next->next;
+            first = NULL;
-            if(first == this){
+            first = prev->next;
-                first = this->next;
+            free(prev);
-                free(this);
-                return first;
-            }
-            else {
-                free(this->next);
-                this->next = third;   
-           }
-        }
-        this = this->next;
-   }
             
+        }
+        x = strcmp(prev->next->value, target);
+        if(x == 0){ 
+            if(first->next->next == NULL) {
+                //struct car* tmp = prev->next;
+                free(prev->next);
+                prev->next = NULL;                
+            }
+        }
+        prev = prev->next;
+   } 
    return first;
       
 }