C-链表3-增加

 #include "stdio.h"

#include "stdlib.h"

 

struct grade{

  int score;

  struct grade *next;

};

 

int main()

{

 int score;

 struct grade *head,*p1,*p2,*head1;

 p1=(struct grade *)malloc(sizeof(struct grade));

 scanf("%d",&score);

 p1->score=score;

 head=p1;

  p2=p1;

 while(1)

  {

     p1=(struct grade *)malloc(sizeof(struct grade));

    scanf("%d",&score);

    if(score <= 0) break;

    p1->score=score;

    p2->next=p1;

    p2=p1;

  }

 p2->next=NULL;

 free(p1);

 

 printf("Plz input the insert pos and value:\n");

 int pos,value;

  scanf("%d,%d",&pos,&value);

  if(pos < 1 )

   {

      exit;

   }

  struct grade *add;

  add=(struct grade *)malloc(sizeof(struct grade));

  add->score=value;

  printf("The result is:\n");

  head1=head;

  

  int k=1;

  while(head != NULL)

   {

      if(k == pos)

       {

         struct grade *tmp;

         tmp=head->next;   

         head->next=add;

         add->next=tmp;

         break;

       }

      head=head->next;

      k++;

   }

 

 

 

 

 

  while(head1 !=NULL)

   {

       printf("%d\n",head1->score);

       head1=head1->next;

   }

 

 

}