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ivadobrincic1 on 11/12/12

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Last Edited at 11/12/12 07:39am

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Lista_pokazivaci.h

/ Published in: C++

Implementacija liste pomocu pokazivaca

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#include <string>
using namespace std;
 
struct animal {
    int sifra;
    string naziv;
    string vrsta;
    string datum;
    int cijena;    
};
 
struct List {
    animal a;
    List *next;
};
 
typedef List Lista;
typedef List* element;
 
element GRESKA;
 
void InitL(Lista *list) {
    element novi = new Lista;
    novi->next = NULL;
    list->next = novi;    
}
 
element FirstL(Lista *list) {
    return list->next;
}
 
element EndL(Lista *list) {
    element tekuci = list->next;
    while (tekuci->next != NULL) {
        tekuci = tekuci->next;
    }
    return tekuci;
}
 
element PreviousL(element e, Lista *list) {
    element tekuci = list;
 
    while (tekuci->next != e) {
        tekuci = tekuci->next;
    }
    return tekuci;
}
 
int InsertL(animal nova_z, element e, Lista *list) {
    element novi = new Lista;
    novi->a = nova_z;
 
    novi->next = e;
    element prethodni = PreviousL(e, list);
    prethodni->next = novi;
    return 1;
}
 
bool DeleteL(element e, Lista *list) {
 
    element tekuci = list;
 
    while (tekuci->next != e) {
        tekuci = tekuci->next;
    }
 
    tekuci->next = e->next;
 
    delete e;
 
    return true;
 
}
 
void DeleteAll(Lista *list) {
    element tekuci, brisi;
 
    tekuci = list->next;
 
    while(tekuci != NULL) {
        brisi = tekuci;
        tekuci = tekuci->next;
        delete brisi;
    }
 
    element zadnji = new Lista;
    zadnji->next = NULL;
    list->next = zadnji;
}
 
element LocateL(animal odbjegla, Lista *list) {
    element tekuci;
    tekuci = list->next;
 
    while (tekuci != EndL(list)) {
        if (tekuci->a.sifra == odbjegla.sifra) {
            return tekuci;
        }
        tekuci = tekuci->next;
    }
 
    return GRESKA;
 
}
 
element NextL(element e, Lista *list) {
    return e->next;
}
 
animal RetrieveL (element e, Lista *list) {
    return e->a;
}

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