程序代码：

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

struct date
{
    unsigned int month;
    unsigned int day;
    unsigned int year;
    struct date* next;
};


int main(int argc, char* argv[])
{
    struct date* head;
    struct date* p;
    p=(struct date*)malloc(sizeof(struct date));
    p->next=NULL;
    head=p;
    int i;
    for(i=0;i<3;i++)
    {
        p=(struct date*)malloc(sizeof(struct date));
        scanf("%u%u%u",&p->month,&p->day,&p->year);
        p->next=NULL;
    }
    p=head;
    while(p!=NULL)
    {
        printf("%4u%2u%2u\n",p->year,p->month,p->day);
        p=p->next;
    }
    free(p);
    return 0;
}