dan lian biao.txt

单连表的建立与添加,删除操作.希望能帮帮忙!

单链表的建立，插入，删除源程序：
#include "stdio.h"
#include "alloc.h"
#define null 0
#define LEN sizeof(struct Node)
typedef struct Node
  {  char data;
     struct Node *next;
  }Lnode,*Linklist;
listinsert(Linklist L,int i,char x)   
  {  Linklist p,s;  
     int j;
     p=L;j=0;
     while(p!=null&&j<i-1)            
       { p=p->next;                                     
         j++;
       }
     s=(Lnode *)malloc(LEN);
     s->data=x;
     s->next=p->next;
     p->next=s;
  }
listdelete(Linklist L,int i)

  {  Linklist p,s;
     int j;
     p=L;j=0;
while(p->next!=null&&j<i-1) 
       { p=p->next; 
         ++j;
       }
     if(j!=i-1)
      { printf("error!");
      }
     s=p->next;
     p->next=s->next;
  }
print(Linklist head,int n)
 { Linklist p;int i; 
   p=head;
   printf("the data of the list are:\n");
   for(i=0;i<=n+1;i++)
     { printf("%c",p->data); 
       p=p->next;
     }
 }

main()
{  Lnode *head,*p,*q; 
   char x;
   int i,n;
   printf("your number:");
   scanf("%d",&n);                                   
   head->next=null;
   q=head;
   for(i=0;i<=n;i++)
     {p=(Lnode *)malloc(LEN);
      scanf("%c",&p->data);
      q->next=null;
      q->next=p;
      q=p;
     }
   print(head,n);                                   
   while(head!=null) 
     { printf("\nPlease input the insert point i="); 
       scanf("%d",&i);
       if(i<1||i>n)
         { printf("The insert point has not been found!\n"); 
           break;
         }
       else
         { printf("Please input the insert data:");
           scanf("%c\n",&x);
           x=getchar();
           getchar();
           printf("Found!\n"); 
           listinsert(head,i,x);
           print(head,n+1);
         }
     }
   while(head!=null)
     { printf("\nPlease input the delete point i=");
       scanf("%d",&i);
       if(i<1||i>n)
        { pirntf("The delete point has not been found!\n");
          break;
        }
       else
         { printf("Found!\n");
           listdelete(head,i);
           print(head,n);
         }
     } 
}