#include <iostream> #include <cstdio> #include <cstdlib> using namespace std; typedef int datetype; typedef struct node { datetype date; struct node* next; }listnode,*linklist; linklist creatlist(int num)//创建链表 { int i; linklist tail=NULL,temp=NULL,head=NULL; for(i=0;i<num;i++) { if(head==NULL) { head=(listnode*)malloc(sizeof(listnode)); head->next=NULL; cin>>head->date; tail=head; } else { temp=(listnode*)malloc(sizeof(listnode)); cin>>temp->date; tail->next=temp; tail=temp; tail->next=NULL; } } return head; } linklist insert(linklist head,int i,int num) { int j=0; linklist p=head,temp=NULL,node=NULL; temp=(linklist)malloc(sizeof(listnode)); if(i==0) { temp->date=num; temp->next=head; return temp; } for(j=0;j<i;j++) { node=p; //找到前驱指针和后继指针 p=p->next; } temp->date=num; node->next=temp; temp->next=p; return head; } linklist deletelist(linklist head,int i) { int j=1; linklist p=head,temp,node;//找到前驱指针和后继指针 if(i==1) { head=head->next; return head; } for(j=1;j!=i;j++) { node=p; p=p->next; } node->next=p->next; return head; } void outputlist(linklist head) { linklist p=head; while(p!=NULL) { cout<<p->date<<' '; p=p->next; } } int main() { linklist head; int num,i; cin>>num; head=creatlist(num); outputlist(head); cin>>i>>num; head=insert(head,i,num); outputlist(head); cin>>i; deletelist(head,i); outputlist(head); }