数据结构的一些代码

1、链表代码

#include <stdio.h>#include <stdlib.h>typedef struct Node{    int data;    struct Node *next;}LinkNode,*List,*Position;List init(){    List s;    s = (List)malloc(sizeof(LinkNode));    s->data = 0;    s->next = NULL;    return s;}void destory(List s){    List p;    p = s;    while(p->next)    {        s = s->next;        free(p);        p = s;    }}void insert(List s,int pos,int e){    int i = 1;    //s = s->next;    while(s&&(i!=pos))    {        s = s->next;        i++;    }    List p = (List)malloc(sizeof(LinkNode));    p->data = e;    p->next = s->next;    s->next = p;}void del(List s,int pos,int e){    int i = 1;    //s = s->next;    while(s&&(i!=pos))    {        s = s->next;        i++;    }    List p = s->next;    s->next = p->next;    free(p);}void show(List s){    s = s->next;    while(s)    {        printf("%d",s->data);        s = s->next;    }}int main(){    List s = init();    insert(s,1,5);    insert(s,2,6);    insert(s,3,7);    insert(s,4,9);    insert(s,5,34);    show(s);    return 0;}

2、链表操作

#include <stdio.h>#include <iostream>typedef int ElemType;typedef struct LNode{ElemType data;struct LNode *next;}LNode,*LinkList;void CreateList(LinkList &L,int n){L=(LinkList)malloc(sizeof(LNode));L->next=NULL;for (int i=n;i>0;--i){LinkList p=(LinkList)malloc(sizeof(LNode));printf("输入插入到链表的元素\n");scanf("%d",&p->data);p->next=L->next;L->next=p;}}int GetElem(LinkList &L,int i){LinkList p=L->next;int j=1;while(p&&j<i){p=p->next;++j;}if (!p&&j>i)return -1;int e=p->data;printf("得到的第%d元素为%d\n",i,e);return 1;}int InsertList(LinkList &L,int i,int e){LinkList p=L;int j=0;while(p&&j<i-1){p=p->next;++j;}if (!p&&j>i)return -1;LinkList s=(LinkList)malloc(sizeof(LNode));s->data=e;s->next=p->next;p->next=s;printf("插入元素位置%d，插入元素为%d\n",i,e);return 1;}int DeleteList(LinkList &L,int i,int e){LinkList p=L,q;int j=0;while(p&&j<i-1){p=p->next;++j;}if (!p&&j>i-1)return -1;q=p->next;p->next=q->next;e=q->data;printf("删除元素位置%d，删除元素为%d\n",i,e);free(q);return 1;}void Length(LinkList &L){int i=0;LinkList p=L->next;while(p){++i;p=p->next;}printf("长度为%d\n",i);}void Desplay(LinkList &L){LinkList p=L->next;while(p){printf("链表中的元素为%d\n",p->data);p=p->next;}}//归并两个链表需要逆序输入void MergeList(LinkList &la,LinkList &lb,LinkList &lc){LinkList pa=la->next;LinkList pb=lb->next;LinkList pc=la;lc=pc;while(pa&&pb){if (pa->data<pb->data){pc->next=pa;pc=pa;pa=pa->next;}else{pc->next=pb;pc=pb;pb=pb->next;}}pc->next=pa?pa:pb;printf("归并后的链表\n");free(lb);}//反转一个单链表void ReverseLink(LinkList &L)//有点问题{if(L==NULL)exit(-1);LinkList curr,prev=NULL,temp;curr=L;while(curr->next){temp=curr->next;curr->next=prev;prev=curr;curr=temp;}curr->next=prev;Desplay(curr);free(temp);}void main(){LinkList L;LinkList lb,lc;int n=0;printf("输入插入到链表的元素个数\n");scanf("%d",&n);CreateList(L,n);printf("输入插入到链表的元素个数\n");scanf("%d",&n);CreateList(lb,n);MergeList(L,lb,lc);Desplay(lc);printf("反转一个单链表\n");ReverseLink(L);InsertList(L,1,1);InsertList(L,2,3);InsertList(L,3,5);DeleteList(L,1,1);GetElem(L,1);Desplay(L);Length(L);system("pause");}

3、顺序表

#include <stdio.h>#include <iostream>typedef int ElemType;#define LIST_ININ_SIZE 100#define LIST_INCREASE 10typedef struct{ElemType *elem;int length;int listsize;}Sqlist;int InitList(Sqlist &L){L.elem=(ElemType*)malloc(sizeof(ElemType)*LIST_ININ_SIZE);if (!L.elem)exit(-1);L.length=0;L.listsize=LIST_ININ_SIZE;return 1;}int InsertList(Sqlist &L,int i,ElemType e){if (i<1||i>L.length+1)return -1;if (i>=L.listsize){ElemType *newbase=(ElemType*)realloc(L.elem,(L.listsize+LIST_INCREASE)*sizeof(ElemType));if (!newbase)exit(-1);L.elem=newbase;L.listsize+=LIST_INCREASE;}ElemType *p,*q;q=&L.elem[i-1];for (p=&L.elem[L.length-1];p>=q;--p)*(p+1)=*p;*q=e;++L.length;printf("插入位置%d,插入元素为%d,线性表的长度%d\n",i,e,L.length);return 1;}int DeleteList(Sqlist &L,int i,ElemType e){if (i<1||i>L.length)return -1;ElemType *p,*q;p=&L.elem[i-1];e=*p;q=L.elem+L.length-1;for(++p;p<q;++p)*(p-1)=*p;--L.length;printf("删除位置%d,删除元素为%d,线性表的长度%d\n",i,e,L.length);return 1;}void main(){Sqlist L;InitList(L);InsertList(L,1,1);InsertList(L,2,2);InsertList(L,3,3);DeleteList(L,1,1);DeleteList(L,2,2);system("pause");}

4、栈

#include <stdio.h>#include <iostream>typedef int ElemType;#define STACK_ININ_SIZE 100#define STACK_INCREASE 10typedef struct{ElemType *base;ElemType *top;int stacksize;}SqStack;int InitStack(SqStack &S){S.base=(ElemType*)malloc(sizeof(ElemType)*STACK_ININ_SIZE);if(!S.base)return -1;S.top=S.base;S.stacksize=STACK_ININ_SIZE;return 1;}void GetTop(SqStack S){if(S.top==S.base)exit(-1);int e=*(S.top-1);printf("栈顶元素%d\n",e);}void Push(SqStack &S,int e){if (S.top-S.base>=STACK_ININ_SIZE){S.base=(ElemType*)realloc(base,sizeof(ElemType)*(STACK_ININ_SIZE+S.stacksize));S.top=S.stacksize+S.base;S.stacksize+=STACK_INCREASE;}*S.top++=e;printf("元素%d入栈\n",e);}void Pop(SqStack &S){if(S.top==S.base)exit(-1);int e=*--S.top;printf("元素%d出栈\n",e);}void main(){SqStack S;InitStack(S);Push(S,0);Push(S,2);Push(S,3);Pop(S);Pop(S);GetTop(S);system("pause");}

5、队列

#include <stdio.h>#include <iostream>#include <malloc.h>typedef int ElemType;typedef struct QNode{struct QNode *next;ElemType data;}QNode,*QueuePtr;typedef struct{QueuePtr front;QueuePtr rear;}LinkQueue;void InitQueue(LinkQueue &q){q.front=q.rear=(QueuePtr)malloc(sizeof(QNode));if(!q.front)exit(-1);q.front->next=NULL;}int EnQueue(LinkQueue &q,ElemType e){    QNode *p;QueuePtr p=(QueuePtr)malloc(sizeof(QNode));if (!p)return -1;p->data=e;p->next=NULL;q.rear->next=p;//注意q.rear=p;printf("元素%d入队\n",e);return 1;}int DeQueue(LinkQueue &q,ElemType e){if(q.front==q.rear)return -1;QNode *p;p=q.front->next;e=p->data;q.front->next=p->next;//注意if (q.rear==p)q.rear=q.front;printf("元素%d出队\n",p->data);free(p);return 1;}int main(){LinkQueue Q;InitQueue(Q);EnQueue(Q,1);EnQueue(Q,2);DeQueue(Q,1);system("pause");return 0;}

6、二叉树

#include <iostream>using namespace std;typedef char EmleType;typedef struct BitNode{EmleType data;struct BitNode *rchild,*lchild;}BitNode,*BiTree;void CreateTree(BiTree &T){char ch;//abc  de  g  fscanf("%c",&ch);if(ch=='*')T=NULL;else{T=(BiTree)malloc(sizeof(BitNode));if(!T)exit(-1);T->data=ch;CreateTree(T->lchild);CreateTree(T->rchild);}}void PreOrder(BiTree T){if(T){printf("%c",T->data);PreOrder(T->lchild);PreOrder(T->rchild);}}void InOrder(BiTree T){if(T){PreOrder(T->lchild);printf("%c",T->data);PreOrder(T->rchild);}}void PosOrder(BiTree T){if(T){PreOrder(T->lchild);PreOrder(T->rchild);printf("%c",T->data);}}void main(){BiTree T;CreateTree(T);PreOrder(T);InOrder(T);PosOrder(T);system("pause");}

7、循环链表的判断

#include <stdio.h>#include <iostream>typedef struct LNode//判断链表是否存在环{char data;struct LNode *next;}*Link;int LinkCircle(Link head){Link p=head;Link p1=head->next;if (head==NULL||head->next==NULL)return 0;if (head=head->next)return 1;while(p!=p1&&p!=NULL&&p1->next!=NULL){p=p->next;p1=p1->next->next;}if(p==p1)return 1;else return 0;}void main(){Link p1,p2,p3,p4;p1=(Link)malloc(sizeof(LNode));p2=(Link)malloc(sizeof(LNode));p3=(Link)malloc(sizeof(LNode));p4=(Link)malloc(sizeof(LNode));p1->next=p2;p2->next=p3;p3->next=p4;p4->next=p1;if (LinkCircle(p1))printf("is circle\n");elseprintf("is not circle\n");system("pause");}

8、判断两个单链表是否交叉及查找交叉点位置
问题1：如何判断俩单链表（俩单链中均无环）是否交叉？
第一条链遍历至尾部，记此结点指针为p1；第二条链也遍历至尾部，此记结点指针为p2。则若此时p1与p2相等，俩单链交叉。函数可写如下：

#include <stdio.h>struct LNode{int data;struct LNode *next;}; void IsCross(LNode *head1,LNode *head2){LNode *p1=head1->next;while(p1->next){p1=p1->next;}LNode *p2=head2->next;while(p2->next){p2=p2->next;}if(p1==p2){printf("Two link lists intersecting.");}else{printf("Two link lists are not intersecting.");}}

问题2：如果交叉，如何找到交叉点？ 若较长链表为head1。设两指针p1和p2分别对链表head1和head2从头遍历，步长均为1，让p1先移动nLen1 - nLen2步，再让p1和p2同时移动，则p1与p2相遇处即为交叉点处。函数可写如下：

LNode *findCross(LNode *head1, int nlen1,LNode *head2, int nlen2){LNode *p1=head1, *p2=head2;int diffLen = nlen1-nlen2;if(diffLen>0){while(diffLen>0){p1=p1->next;diffLen--;}}else{while(diffLen<0){p2=p2->next;diffLen--;}}while(p1!=p2){p1=p1->next;p2=p2->next;}return p1;}