11.10.cpp

c入门代码大全

//写一个函数以删除动态链表中指定的结点
struct student *del(struct student *head , long num) 
{

   struct student *p1 , *p2 ;
   if(head == NULL)
     {
     
       printf("\nlist null\n") ;
       goto end ;
     
     }
     p1 = head ;
     while(num != p1->num && p1->next!= NULL)
       {
       
           p2 = p1 ;
           p1 = p1->next ;
       
       }
     if(num == p1->num)
       {
       
          if(p1==head)
                head==p1->next ;
          else
                p2->next=p1->next ;
          printf("delete:%ld\n" , num) ;
          n = n-1 ;
          
       }
     else 
         printf("%ld not been found!\n" , num) ;
     end ;
     return (head) ;
       
}