结构体冒泡排序时出现错误

冒泡排序结果我也不知道什么情况

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

struct student
{
    char name[20];
    int age;
    float score;

};

void IntputStudent(struct student * pstu, int j)
{
    printf("请输入第%d个学生的姓名：", j + 1);
    scanf_s("%s", pstu[j].name, 20);
    
    printf("请输入第%d个学生的年龄：", j + 1);
    scanf_s("%d", &pstu[j].age);

    printf("请输入第%d个学生的成绩：", j + 1);
    scanf_s("%f", &pstu[j].score);
    printf("\n");
    printf("\n");

    return;
}


void sort(struct student* pstu, int n)
{

    int k, m;
    struct student t;

    for (k = 0; k < n-1; ++k)
    {
        for (m = 0; m < n-k-1 ; ++m)
        {
            if (pstu[m].score < pstu[m + 1].score)
            {
                t = pstu[m];

                pstu[m] = pstu[m + 1];

                pstu[m + 1] = t;

        
            }

        
        }
    }
    return;
}


void OutputStudent(struct student* pstu, int j)
{
    printf("第%d学生的姓名：%s\n", j + 1,pstu[j].name);
    

    printf("第%d学生的年龄：%d\n", j + 1,pstu[j].age);


    printf("第%d学生的成绩：%.2f\n", j + 1,pstu[j].score);
    
    printf("\n");
    printf("\n");


}




int main(void)
{
    int len;
    printf("请输入学生个数：");
    scanf_s("%d", &len);
    printf("\n");


    struct student* stu;
    stu = (struct student*)malloc(len * sizeof(struct student));
     
    int i = 0;
    for (i = 0; i < len; ++i)
    {
    
        IntputStudent(&stu[i], i);

    }


    sort(stu, len);


    for (i = 0; i < len; ++i)
    {

        OutputStudent(&stu[i], i);
    }





    return 0;
}

OutputStudent(&stu[i], i);

改为

OutputStudent(stu, i);