odmazat chvost

du4/snake.c

@@ -15,7 +15,21 @@ struct snake* add_snake(struct snake* snake,int x,int y){
 }
 
 struct snake* remove_snake(struct snake* snake){
-    return NULL;
+
+    struct snake* clanok = snake;
+
+    if (snake -> next == NULL) {
+        free(snake);
+        return NULL;
+    }
+
+    while (clanok -> next -> next != NULL) { // posuvam sa po hadovi kym nenajdem koniec chvosta ktory odmazem
+        clanok = clanok -> next;
+    }
+
+    free (clanok -> next); //po tom co som nasiel kde je koniec, odmazem koniec chvosta a korunujem nasledujuci clanok novym koncom
+    clanok -> next = NULL;
+    return snake; //kedze som menil snaka podla referenciam v pamati, mozem vratit noveho stareho hada
 }
 
 void free_snake(struct snake* sn){