如果坚持使用qsort，就在结构体里另加一标记记录出现顺序，成绩相同时按顺序排序。

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

typedef struct
{
    char name[50];
    int score;
    int id;
} Student;

int cmp1(const int *a,const int *b)
{
    Student* ia=(Student*)a;
    Student* ib=(Student*)b;

    if(ia->score==ib->score)return (ia->id>ib->id);
        else return ia->score>ib->score;
}

int cmp2(const int *a,const int *b)
{
    Student* ia=(Student*)a;
    Student* ib=(Student*)b;

    if(ia->score==ib->score)return (ia->id>ib->id);
        else return ia->score<ib->score;
}

int main()
{
    int n,order;
    while(scanf("%d",&n)!=EOF)
    {
        Student students[n];
        scanf("%d",&o...