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

struct Stu
{
    int num;
    double score;
    Stu * next;
};

int main(void)
{
    void print(Stu * q);
    int n;
    Stu * p1, * p2, * head=NULL;
    p1=(Stu *)malloc(sizeof(Stu));
    scanf("%d,%lf", &p1->num, &p1->score);
    for (n=0; (p1->num)!=0;)
    {
        ++n;
        if (n==1)
            head=p1;
        else
            p2=p1;
        p1=(Stu *)malloc(sizeof(Stu));
        scanf("%d,%lf", &p1->num, &p1->score);
        if ((p1->num)!=0)
            p2->next=p1;//这里由于我的疏忽，没有为p2分配一个动态存储空间，但是发现运行后第一次输入num,score竟然没事，为什么？按理说应该会出错的吧？
        else
            p2->next=NULL;
    }
    print(head);

    return 0;
}

void print(Stu * q)
{
    Stu * mo=q;
    for (;(mo->next)!=NULL; mo=mo->next)
        printf("%d, %lf", mo->num, mo->score);

}