ListElem *TelefonBuch_Loeschen(ListElem *Head, const char *Name) {
	ListElem*a = Head;
	ListElem *temp, *pre = NULL;
	if (strcmp(Head->Name,Name)==0) {
		temp = a->next;
		//free(a->Name);
		free(a);
		return temp;
	}
	else {
		pre = Head;
		for (a = a->next; a != NULL; a = a->next) {
			if (strcmp(a->Name, Name) == 0) {
				pre->next = a->next;
				free(a);
				a = pre;
			}
			else {
				pre = pre->next;
			}
		}
	}
	return Head;
}