typedef struct litem_t{
  ...
 } litem;
 
 typedef struct llist_t{
  struct litem_t *item;
  struct llist_t *next;
 } llist;
  
 llist* addItem(llist* alist, char* orderno, char* name, float price, int count, float sum){
  ...
 }
 
 ...weitere Hilfsfunktionen ...
  
 int main(int argc, char** argv){
 ...
 llist *alist; 
 alist= addItem(NULL, "UT 2042 C","40 MHz-Digital-Speicher-Oszilloskop",349.00, 1, 349.00);
 alist= addItem(alist, "AGF 2 SW","Hirschmann-Abgreifklemme 4mm schwarz",5.10,1, 5.10);
 ...
 /* ausgeben der Liste: */
 ...
 }