习题02-建立单链表（2）.c

数据结构各章实验源代码； 数据结构实验源代码

#include  "datastru.h"
#include  <stdio.h>
#include  <malloc.h>

int count_head(LINKLIST *head){
/*带头结点的单链表:输出单链表元素值并计数*/
  int i = 0;
  LINKLIST *p;
  p = head->next;
  printf("输出单链表元素值 : ");
  while(p != NULL)
   {printf("  %c",p->data);
    i++;
    p = p->next;}
  printf("\n");
  return i;
}

LINKLIST *creatlink_head_head(LINKLIST *head) {
/*用头插入法建立带头结点的单链表*/
  LINKLIST  *t;
  char ch;

  t = (LINKLIST *)malloc(sizeof(LINKLIST));
  head = t;
  t->next = NULL;
  printf("单链表元素值为单个字符, 连续输入，$为结束字符  : ");
  while((ch = getchar())!= '$')
   {t = (LINKLIST *) malloc(sizeof(LINKLIST));
    t->data = ch;
    t->next = head->next;
    head->next = t;}
  return(head);
}

main()
 { LINKLIST *head = NULL;
   int num;

   printf("\n    建立单链表\n\n");
   head = creatlink_head_head(head);
   fflush(stdin);
   num = count_head(head);
   printf("单链表元素个数 = %d\n", num);
}