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C语言实现链表

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

单向链表：

  1 #include <cstdio>
  2 using namespace std;
  3 struct LNode{
  4     int data;
  5     struct LNode * next;
  6 };
  7 struct LinkList{
  8     LNode * head,tail;
  9     int len;
 10 };
 11 void InitList(LinkList &L){
 12     L.len = 0;
 13     L.head->next = NULL;
 14 }
 15 void CreateList_L(LinkList &L,int n){
 16     L.len = n;
 17     LNode* & head = L.head;
 18     head = new LNode();
 19     head -> next =NULL;
 20     while(n--){
 21         LNode *p = new LNode();
 22         scanf("%d",&p->data);
 23         p->next = head->next;
 24         head->next=p;
 25     }
 26 }
 27 void CreateList(LinkList &L,int n){
 28     L.len = n;
 29     L.head = new LNode;
 30     LNode *p = L.head;
 31     while(n--){
 32         LNode * t =new LNode();
 33         scanf("%d",&t->data);
 34         p->next = t;
 35         p = t;
 36     }
 37     p->next  = NULL;
 38 }
 39 void ListTraverse(LinkList L,void (visit)(LNode*)){
 40     LNode *p =L.head->next;
 41     while(p!=NULL){
 42         visit(p);
 43         p = p->next;
 44     }
 45 }
 46 int ListInsert_L(LinkList &L,int i, int data){
 47     LNode * p =L.head;
 48     int j = 0;
 49     while(p&&j++<i ){
 50         p=p->next;
 51     }
 52     if(!p || i<0)return 0;
 53     LNode *t = new LNode();
 54     t->data = data;
 55     t->next = p->next;
 56     p->next = t;
 57     L.len++;    
 58     return 1;
 59 }
 60 int ListDelete_L(LinkList &L,int i,int &data){
 61     LNode *p = L.head;
 62     int j=0;
 63     while(p&&j++<i){
 64         p = p->next;
 65     }
 66     if(!(p->next) || i <0)return 0;
 67     LNode *t = p->next;
 68     p->next = p->next->next;
 69     data=t->data;
 70     delete t;
 71     L.len--;
 72     return 1;
 73 }
 74 int GetElem_L(LinkList L,int i,int &data){
 75     LNode *p = L.head;
 76     int j=0;
 77     while(p && j++<=i) p=p->next;
 78     if(!p|| i<0 )return 0;
 79     data=p->data;
 80     return 1;
 81 }
 82 int MergeList(LinkList &La,LinkList &Lb,LinkList &Lc){
 83     LNode *pa = La.head -> next;
 84     LNode *pb = Lb.head -> next;
 85     Lc.head=new LNode();
 86     LNode *pc = Lc.head;
 87     while(pa&&pb){
 88         if(pa->data < pb->data){
 89             pc->next = pa;
 90             pa = pa->next;
 91         }
 92         else{
 93             pc->next = pb;
 94             pb = pb->next;
 95         }
 96         pc = pc -> next;
 97     }
 98     pc->next = pa == NULL?pb:pa;
 99 }
100 void visit(LNode *p){
101     printf("%d\n",p->data);
102 }
103 int main(){
104     LinkList list,list2,list3 ;
105   //  InitList(list);
106     CreateList(list,5);
107     CreateList(list2,5);
108     MergeList(list,list2,list3);
109     //ListInsert_L(list,-1,6);
110     //int v =123;
111     //GetElem_L(list,4,v);
112     //printf("%d",v);
113     ListTraverse(list3,visit);
114     return 0;
115 }

循环链表:

  1 #include <cstdio>
  2 #include <stack>
  3 using namespace std;
  4 struct LNode{
  5     int data;
  6     struct LNode * next;
  7 };
  8 struct LinkList{
  9     LNode * head,*tail;
 10     int len;
 11 };
 12 void CreateList_L(LinkList &L,int n){
 13     L.len = n;
 14     LNode* & head = L.head;
 15     head = new LNode();
 16     head -> next =head;
 17     while(n--){
 18         LNode *p = new LNode();
 19         scanf("%d",&p->data);
 20         p->next = head->next;
 21         head->next=p;
 22     }
 23 }
 24 void CreateList(LinkList &L,int n){
 25     L.len = n;
 26     L.head = new LNode;
 27     LNode *p = L.head;
 28     while(n--){
 29         LNode * t =new LNode();
 30         scanf("%d",&t->data);
 31         p->next = t;
 32         p = t;
 33     }
 34     p->next  = L.head;
 35 }
 36 void ListTraverse(LinkList L,void (visit)(LNode*)){
 37     LNode *p =L.head->next;
 38     while(p!=L.head){
 39         visit(p);
 40         p = p->next;
 41     }
 42 }
 43 int ListInsert_L(LinkList &L,int i, int data){
 44     LNode * p =L.head;
 45     int j = 0;
 46     while((p!=L.head||!j)&&j++<i){
 47         p = p->next;
 48     }
 49     if( p == L.head&&j || i<0)return 0;
 50     LNode *t = new LNode();
 51     t->data = data;
 52     t->next = p->next;
 53     p->next = t;
 54     L.len++;    
 55     return 1;
 56 }
 57 int ListDelete_L(LinkList &L,int i,int &data){
 58     LNode *p = L.head;
 59     int j=0;
 60     while((p!=L.head||!j)&&j++<i){
 61         p = p->next;
 62     }
 63     if((p->next)==L.head || i <0)return 0;
 64     LNode *t = p->next;
 65     p->next = p->next->next;
 66     data=t->data;
 67     delete t;
 68     L.len--;
 69     return 1;
 70 }
 71 int GetElem_L(LinkList L,int i,int &data){
 72     LNode *p = L.head;
 73     int j=0;
 74     while((p!=L.head||!j) && j++<=i) p=p->next;
 75     if(p==L.head&&j|| i<0 )return 0;
 76     data=p->data;
 77     return 1;
 78 }
 79 void MergeList(LinkList &La,LinkList &Lb,LinkList &Lc){
 80     LNode *pa = La.head -> next;
 81     LNode *pb = Lb.head -> next;
 82     Lc.head=new LNode();
 83     LNode *pc = Lc.head;
 84     while(pa!=La.head&&pb!=Lb.head){
 85         if(pa->data < pb->data){
 86             pc->next = pa;
 87             pa = pa->next;
 88         }
 89         else{
 90             pc->next = pb;
 91             pb = pb->next;
 92         }
 93         pc = pc -> next;
 94     }
 95     if(pa==La.head){
 96         pc->next = pb;
 97         while(pb->next!=Lb.head)pb=pb->next;
 98         pb->next=Lc.head;
 99     }
100     else {
101         pc->next = pa;
102         while(pa->next!=La.head)pa=pa->next;
103         pa->next=Lc.head;        
104     }
105 
106 }
107 void visit(LNode *p){
108     printf("%d\n",p->data);
109 }
110 int main(){
111     LinkList list,list2,list3 ;
112   //  InitList(list);
113     CreateList(list,5);
114     //CreateList(list2,5);
115 
116     //MergeList(list,list2,list3);
117     int v =123;
118     //ListDelete_L(list,5,v);
119     //
120     //
121     GetElem_L(list,4,v);
122     printf("%d",v);
123     ListTraverse(list,visit);
124     return 0;
125 }

循环链表：

  1 #include <cstdio>
  2 using namespace std;
  3 struct Node{
  4     int data;
  5     struct Node * prev;
  6     struct Node * next;
  7 };
  8 struct LinkList{
  9     Node * head;
 10     int len; 
 11 };
 12 void CreateList_L(LinkList &L, int n){
 13     L.len = n;
 14     L.head = new Node();
 15     Node * head = L.head;
 16     head->next = NULL;
 17     head->prev = NULL;
 18     while(n--){
 19         Node *t  = new Node();
 20         scanf("%d",&t->data);
 21         Node * d = head->next;
 22         t->prev = head;
 23         head->next = t;
 24         t->next = d;
 25         if(d) d->prev = t;
 26     }
 27 }
 28 void CreateList(LinkList &L,int n){
 29     L.len = n;
 30     L.head = new Node();
 31     Node * p = L.head;
 32     while(n--){
 33         Node *t = new Node();
 34         scanf("%d",&t->data);
 35         p->next = t;
 36         t->prev = p;
 37         p = t;
 38     }
 39     p->next = NULL;
 40 }
 41 void visit(Node *p){
 42     printf("%d",p->data);
 43 }
 44 void ListTraverse(LinkList L,void (visit)(Node*)){
 45     Node *p = L.head->next;
 46     while(p->next!=NULL){
 47         visit(p);
 48         p = p->next;
 49     }
 50     visit(p);
 51     printf("\n");
 52     while(p->prev!=NULL){
 53         visit(p);
 54         p = p->prev;
 55     }
 56 }
 57 int ListInsert_L(LinkList &L,int i ,int data){
 58     Node * p = L.head;
 59     int j = 0;
 60     while(p&&j++ < i)p = p->next;
 61     if(!p||i<0)return 0;
 62     Node * t = new Node();
 63     t->data = data;
 64     Node * n = p->next;
 65     p->next = t;
 66     t->prev = p;
 67     if(n)n->prev = t;
 68     t->next = n;
 69     return 1;
 70 }
 71 int ListDelete_L(LinkList &L,int i,int &data){
 72     Node * p = L.head;
 73     int j = 0; 
 74     while(p && j++ < i) p = p->next;
 75     if((!p||!p->next) || i < 0) return 0;
 76     Node * n = p->next;
 77     data = n->data;
 78     if(n->next)n->next->prev = p;
 79     p->next = n->next;
 80     delete n;
 81     return 1;
 82 }
 83 void MergeList(LinkList &La,LinkList &Lb,LinkList &Lc){
 84     Node * pa = La.head->next;
 85     Node * pb = Lb.head->next;
 86     Lc.head = new Node();
 87     Node * pc = Lc.head;
 88     pc->prev = NULL;
 89     while(pa && pc){
 90         if(pa->data < pb->data){
 91             pc->next = pa;
 92             pc->next->prev = pc;
 93             pa = pa->next;
 94         }
 95         else{
 96             pc->next = pb;
 97             pc->next->prev = pc;
 98             pb = pb->next;
 99         }
100         pc = pc->next;
101     }
102     if(pa) {
103         pc->next = pa;
104         pa->prev = pc;
105     }
106     else{
107         pc->next = pb;
108         pb->prev = pc;
109     }
110 }
111 int GetElem_L(LinkList L,int i,int &data){
112     Node * p = L.head->next;
113     int j = 0;
114     while(p && j++ < i) p = p->next;
115     if(!p || i < 0)return 0;
116     data = p->data;
117     return data;
118 }
119 int main(){
120     LinkList list,list1,list2;
121     CreateList(list,5);
122     CreateList(list1,5);
123     MergeList(list,list1,list2);
124     //printf("[%d]",v);
125     ListTraverse(list2,visit);
126     return 0;
127 }

 

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