C++编程，请教一下各位

有一个班级有5个学生，6门课。
要求：
1．求毎门课的平均分；
2．找出有2门以上课程不及格的学生，输出他们的学号和全部课程成绩以及平均成绩；
3．找出平均成绩在90分以上的学生，并输出其姓名和成绩。
4．找出平均分在85分以下的学生，并输出其姓名和成绩。应该编写4个函数实现上述4个要求。

代码：

struct Student
{
    string m_id;
    float vList[6];  //存储6门课成绩
}; 

void getAdv(Student* stu)
{
    for (int i = 0; i < 6; ++i)
    {
        float sum = 0;
        for (int j = 0; j < 5; ++j)
        {
            sum += stu[j].vList[i];
        }
        cout << "第" << i + 1 << "门课的平均分是:" << sum/5<< endl;
    }
}

void failStudent(Student* stu)
{
    for (int i = 0; i < 5; ++i)
    {
        int Count = 0;  //记录不及格课程数
        for (int j = 0; j < 6; ++j)
        {
            if (stu[i].vList[j] < 60)
            {
                Count++;
            }
        }
        if (Count > 2)
        {
            cout << "不及格学生:" << stu[i].m_id << endl;
            cout << "成绩";
            int sum = 0;
            for (int j = 0; j < 6; ++j)
            {
                sum += stu[i].vList[j];
                cout << " " << stu[i].vList[j];
            }
            cout << endl;
            cout << "平均成绩:" << sum / 6 << endl;
        }
    }
}

void getupStudent(Student* stu)
{
    for (int i = 0; i < 5; ++i)
    {
        int sum = 0;
        for (int j = 0; j < 6; ++j)
        {
            sum += stu[i].vList[j];
        }
        if (sum / 6 > 90)
        {
            cout << "平均分大于90学生:" << stu[i].m_id << endl;
            cout << "成绩";
            int sum = 0;
            for (int j = 0; j < 6; ++j)
            {
                sum += stu[i].vList[j];
                cout << " " << stu[i].vList[j];
            }
            cout << endl;
        }    
    }
}

void getmiddleStudent(Student* stu)
{
    for (int i = 0; i < 5; ++i)
    {
        int sum = 0;
        for (int j = 0; j < 6; ++j)
        {
            sum += stu[i].vList[j];
        }
        if (sum / 6 < 85)
        {
            cout << "平局分小于85学生:" << stu[i].m_id << endl;
            cout << "成绩";
            int sum = 0;
            for (int j = 0; j < 6; ++j)
            {
                sum += stu[i].vList[j];
                cout << " " << stu[i].vList[j];
            }
            cout << endl;
        }
    }
}

int main()
{
    Student students[5];
    students[0] = { "aa",90,60,50,30,20,90 };
    students[1] = { "bb",80,70,40,50,50,60 };
    students[2] = { "cc",100,85,90,90,88,97 };
    students[3] = { "dd",60,90,90,70,70,80 };
    students[4] = { "ee",50,100,40,30,40,70 };

    getAdv(students);
    failStudent(students);
    getupStudent(students);
    getmiddleStudent(students);
    
}

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