1. 程式人生 > >C++沉思錄__連結串列的反轉

C++沉思錄__連結串列的反轉

/*
連結串列反轉
*/
typedef struct _Node 
{
 int  value;
 struct _Node *next;
} Node;
typedef struct _linkList
{
Node *next;
} LinkList;
LinkList* linkListReverse(LinkList *list)
{
    if(!list)
        return nullptr;
    Node * cur = list->next;
    Node *next = nullptr;
    Node *pre = nullptr;
    while(cur->next)
    {
         next = cur->next;
         cur->next = pre;
         pre = cur;
         cur = next;
 }
    cur->next = pre;
    list->next =cur;
     return list;   
}

測試程式

int main(int argc, char const *argv[])
{

    cout<<"測試程式"<<endl;
    cout<<"************"<<endl;
    LinkList *list;
   Node n1;
   Node n2;
   Node n3;
   Node n4;
   list->next = &n1;
   n1.next = &n2;
   n1.value =100;
   n2.next =&n3;
   n2.value =101;
   n3.next =&n4;
   n3.value=102;
   n4.value =104;
   n4.next = nullptr;
    LinkList *l = linkListReverse(list);
    Node *q = l->next;
    while(q)
    {
        cout<<q->value<<endl;
         q =q->next;
         
    }
    system("pause");
    return 0;

}