程序代码：

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

#define LEN  sizeof(struct list)

typedef struct list
    { int data;
     struct list *next;
    }node;


 void main()

 { node* ptr,*head;
   int num,i;
   ptr=(node*)malloc(LEN);
   ptr=head;
   printf("input 5 numbers:\n");
    for(i=0;i<5;i++)
    {  scanf("%d",&num);
       ptr->data=num;
       ptr->next=(node*)malloc(LEN);
       if(i==4)
           ptr->next=NULL;
       else ptr=ptr->next;
      
       }
    free(ptr);
    ptr=head;
    while(ptr!=NULL)
    {
        printf("The value is==>%d\n",ptr->data);
        ptr=ptr->next;
    }
   
    }

程序代码：

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

#define LEN  sizeof(struct list)

typedef struct list
{ int data;

 struct list *next;
}node;

void main()
{ 
   node* ptr,*head;
   int num,i;
   ptr=(node*)malloc(LEN);
   ptr->next = NULL;
   head = ptr;
   printf("input 5 numbers:\n");
    int n = 5;
    while(n--)
    {
        scanf("%d",&num);
        ptr=(node*)malloc(LEN);
        ptr->next = NULL;
        ptr->data = num;

        ptr->next = head->next;
        head->next = ptr;
    }
    ptr=head->next;
    while(ptr!=NULL)
    {
        printf("The value is==>%d\n",ptr->data);
        ptr=ptr->next;
    }
  
    }