程序代码：

#include<stdio.h>
#include<stdlib.h>

int main()
{
  struct new
  {
    int num;
    struct new *next;
  };
  struct new *first=NULL;
  struct new *current=NULL;
  struct new *last=NULL;

 

  first=malloc(sizeof(struct new));
  current=malloc(sizeof(struct new));
  last=malloc(sizeof(struct new));
  printf("please input the first number:");
  setbuf(stdin,NULL);
  scanf("%d",&first->num);
  current=first->next;

 

  while(1)
    {
      scanf("%d",&current->num);
      if(current->num==-1)  //输入-1表示结束
    {last->next==NULL;break;}
      last=current;
      current=malloc(sizeof(struct new));
      last->next=current;
      current->next=NULL;
    }
  current=first;
  do
    {
      printf("%d\n",current->num);
      current=current->next;
    }
  while(current);
   

}