15

cv4/a_train.c

@@ -39,11 +39,38 @@ void print_train(struct car* first) {
 }
 
 void cancel_train(struct car* first) {
-    
+    struct car* temp;
+    while (first != NULL) {
+        temp = first;
+        first = first->next;
+        free(temp);
+    }
+    printf("Vsetky vozne boli zrusene.\n");
 }
-
 
 struct car* clear_train(struct car* first, const char* target) {
-	return NULL;
+    struct car* current = first;
+    struct car* previous = NULL;
+    
+    while (current != NULL) {
+        // Porovnanie hodnoty cielovej stanice
+        if (strcmp(current->value, target) == 0) {
+            // Ak sa cielova stanica zhoduje, odstráni vozeň
+            if (previous == NULL) {
+                // Ak je to prvý vozeň
+                first = current->next;
+            } else {
+                previous->next = current->next;
+            }
+            struct car* temp = current;
+            current = current->next;
+            free(temp);
+        } else {
+            // Ak sa nezhoduje, prejde na nasledujúci vozeň
+            previous = current;
+            current = current->next;
+        }
     }
     
+    return first;
+}