问函数不将学生的最低年级返回主

EN

int main() {
    int students = 0;
    int avg = 0.0f;
    int total = 0;
    int i = 0;
    float lowest = 0;
    int sumofhigh = 0;
    cout << "================Calculating average of grades while dropping lowest grade============\n \n";
    int score[25];

    getscores(score, total, i);
    cout << "\n";
    lowest =  lowgrade(score, students);
    cout << "The lowest score is: " << lowest << " ";


}

int lowgrade(int score[], int numberstudent) {
    int low = score[0];
    for (int i = 0; i <= numberstudent ; ++i) {
        if (score[i]<low) 
            low = score[i];

    }
    return low;
}
void getscores(int score[], int &total, int i) {
    int student = 0; total = 0;  i = 0;;
    cout << "Please enter the number of students: "; cin >> student;
    while (student < 0) {
        cout << "Students can't be negative can they? enter again: "; cin >> student;
    }

    cout << "\n";
    cout << "Now enter the grades for each of the students!: \n";
    for ( i = 0; i < student; ++i) {
        cout << "Enter grades for student " << i + 1 << " "; cin >> score[i];
        while (score[i] < 0 || score[i]>100) {
            cout << "Students can't get above hundred or have negative grades, enter again: "; cin >> score[i];
        }

        total += score[i];
        cout << "\n";
    }
    cout << "The total sum of grades is: " << total << " ";
}