c语言结构体数组无法运行？

改动部分及原因见注释，以下代码可以直接运行

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

struct student {
                char name[20];
                int score;
                char *passdown;
        };

void passOrdown(struct student *);   // 这里用到了student，要先声明，所以student
void output(struct student *);       // 的定义要放在前面，然后才是函数声明

int main()
{
        struct student stu[3];
        int i;
        for (i=0; i<3; i++) {
        printf("请输入第#%d位同学的姓名： ", i+1);
        scanf("%s", stu[i].name);

        printf("请输入第#%d位同学c语言的分数：", i+1);
        scanf("%d", &stu[i].score);
        printf("\n");
        }
        passOrdown(stu);
        output(stu);
        return 0;
}
void passOrdown(struct student *p)
{
        int i;
        for (i=0; i<3; i++) {
                if (p[i].score >= 60)      // p是student的数组 ，不是一个student
                        p[i].passdown = "pass";
                else
                        p[i].passdown = "down";
        }
}

void output(struct student *q)
{
        int i;
        printf("\n\n%10s %10s %20s\n", "Name", "Score", "Passdown");
        for (i=1; i<42; i++)
                printf("=");
        printf("\n");
        for (i=0; i<3; i++) {
                printf("%10s %10d %20s\n", q->name, q->score, q->passdown);
                q++;
        }
}