#include <stdio.h>
#include <stdlib.h>

#ifndef NULL
	#define NULL ((void*)0)
#endif

typedef struct Elem_s {
	char Titel[256];
	char Interpret[256];
	struct Elem_s* next;
} Elem_t;

void readfromKeyboard(Elem_t *item) {
	if(item == NULL) {
		perror("Item not allocated!");
		exit(-1);
	}
	printf("Neuer Eintrag:\nTitel\n");
	scanf("%s",item->Titel);
	printf("Interpret\n");
	scanf("%s",item->Interpret);
	item->next=NULL;
}

Elem_t *allocateElement() {
	Elem_t* item;

	item = (Elem_t*)malloc(sizeof(Elem_t));
	readfromKeyboard(item);
	return item;
}

Elem_t* insertLast(Elem_t* list) {
	Elem_t* last;
	Elem_t* newitem = allocateElement();
	if(list == NULL) {
		return newitem;
	}

	last = list;

	while(last->next != NULL) {
		last=last->next;
	}

	last->next = newitem;
	return list;
}

void freeList(Elem_t** list) {
	Elem_t* last;
	Elem_t* temp;

	if(list == NULL) {
		return;
	}

	last= (*list);
	while(last != NULL) {
		temp= last->next;
		free((void*)last);
		last=temp;
	}
	(*list) = NULL;
}

void print_singleElement(Elem_t *element) {
	if(element == NULL) { return; }
	printf("%s\t%s\n",element->Interpret,element->Titel);
}

void print_entireList(Elem_t *list) {
	unsigned long i=0;
	while(list != NULL) {
		printf("%lu.",i++);
		print_singleElement(list);
		list=list->next;
	}
}


int main() {
	Elem_t* list = insertLast(NULL);
	list=insertLast(list);
	list=insertLast(list);
	print_entireList(list);
	freeList(&list);

	return 0;
}